Leaders of the Senate intelligence committee said Wednesday that they have not determined roughly nine months into their investigation whether Russia coordinated with the Trump campaign to sway the 2016 presidential election.

"The issue of collusion is still open," said the Republican committee chairman, Sen. Richard Burr, who along with the panel's top Democrat, Sen. Mark Warner, provided an update on a congressional investigation that was launched the same month as President Donald Trump was inaugurated.

More than 100 witnesses have been interviewed - including former Trump campaign chairman Paul Manafort and Trump son-in-law Jared Kushner - and more than 100,000 pages of documents have been reviewed, Burr said.

The lawmakers said that though they have reached no conclusion about whether the campaign colluded with the Kremlin - the question also at the heart of a separate criminal investigation by special counsel Robert Mueller - their investigation has left no doubt about a multi-pronged Russian effort to meddle in American politics.

"The Russian intelligence service is determined, clever and I recommend every campaign and every elected official take this seriously," Burr said.

Warner later added that there was a "large consensus" that Russians had hacked into political files and strategically released them with the goal of influencing the election. He said Russian hackers had also tested the vulnerabilities of election systems in 21 states, though there's no evidence that any voting tallies were altered.

The news conference Wednesday was an effort by the committee to lay out some of what's been found so far as the 2018 midterm elections approach.

Washington, DC - 4 October 2017

1. Wide shot of Burr and Warner walking into Senate Press Gallery

2. SOUNDBITE (English) Sen. Richard Burr, (R) North Carolina:

"That the issue of collusion is still open, that we continue to investigate both intelligence and witnesses and that we're not in a position where we will come to any type of temporary finding on that until we've completed the process."

3. Cutaway of press.

4. SOUNDBITE (English) Sen. Richard Burr, (R) North Carolina:

"Well let me just say that we have more work to do as it relates to collusion but we're developing a clearer picture of what happened. What I will confirm is that the Russian intelligence service is determined, clever and I recommend that every campaign and every election official take this very seriously as we move into this November's election. And as we move into preparation for the 2018 election."

5. Cutaway of press

6. SOUNDBITE (English) Sen. Richard Burr, (R) North Carolina:

"As it relates to the Steele dossier, unfortunately the committee has hit a wall. We have on several occasions made attempts to contact Mr. Steele, to meet with Mr. Steele, to include personally the vice chairman and myself as two individuals making that connection. Those offers have gone unaccepted. The committee cannot really decide the credibility of the dossier without understanding things like who paid for it? Who are your sources and sub sources?"

7. Cutaway of press

8. SOUNDBITE (English) Sen. Mark Warner, (D) Virginia:

"The Russian active measures efforts did not end on Election Day 2016. They were not only geared at the United States of America. We have seen Russia enacted measures take place in France. We've seen concerns raised in the Netherlands. We've seen concerns raised in Germany. And we need to be on guard."

9. Cutaway of press

10. SOUNDBITE (English) Sen. Mark Warner, (D) Virginia:

"I think there is a large consensus that they hacked into political files, released those files, in an effort to influence the election. We think they actively tried to at least test the vulnerabilities of 21 states' electoral systems."

11. Wide shot of press conference

12. SOUNDBITE (English) Sen. Richard Burr, (R) North Carolina:

"We can certifiably say that no vote totals were affected - that the tallies are accurate. The outcome of the election based upon the counting votes. They they did not in any way shape or form that we've been able to find alter that."

13. Wide shot of press conference

Leaders of the Senate intelligence committee said Wednesday that they have not determined roughly nine months into their investigation whether Russia coordinated with the Trump campaign to sway the 2016 presidential election.

"The issue of collusion is still open," said the Republican committee chairman, Sen. Richard Burr, who along with the panel's top Democrat, Sen. Mark Warner, provided an update on a congressional investigation that was launched the same month as President Donald Trump was inaugurated.

More than 100 witnesses have been interviewed - including former Trump campaign chairman Paul Manafort and Trump son-in-law Jared Kushner - and more than 100,000 pages of documents have been reviewed, Burr said.

The lawmakers said that though they have reached no conclusion about whether the campaign colluded with the Kremlin - the question also at the heart of a separate criminal investigation by special counsel Robert Mueller - their investigation has left no doubt about a multi-pronged Russian effort to meddle in American politics.

"The Russian intelligence service is determined, clever and I recommend every campaign and every elected official take this seriously," Burr said.

Warner later added that there was a "large consensus" that Russians had hacked into political files and strategically released them with the goal of influencing the election. He said Russian hackers had also tested the vulnerabilities of election systems in 21 states, though there's no evidence that any voting tallies were altered.

The news conference Wednesday was an effort by the committee to lay out some of what's been found so far as the 2018 midterm elections approach.

Washington, DC - 4 October 2017

1. SOUNDBITE (English) Sen. Richard Burr, (R) North Carolina:

"I thought I was very clear that the issue of collusion is still open, that we continue to investigate both intelligence and witnesses and that we're not in a position where we will come to any type of temporary finding on that until we've completed the process."

2. Cutaway of press

3. SOUNDBITE (English) Sen. Richard Burr, (R) North Carolina:

"What I will confirm is that the Russian intelligence service is determined, clever and I recommend that every campaign and every election official take this very seriously as we move into this November's election. And as we move into preparation for the 2018 election."

4. SOUNDBITE (English) Sen. Richard Burr, (R) North Carolina:

"As it relates to the (Christopher) Steele dossier, unfortunately the committee has hit a wall. We have on several occasions made attempts to contact Mr. Steele, to meet with Mr. Steele, to include personally the vice chairman and myself as two individuals making that connection. Those offers have gone unaccepted. The committee cannot really decide the credibility of the dossier without understanding things like who paid for it? Who are your sources and sub sources?"

5. Cutaway of press

6. SOUNDBITE (English) Sen. Mark Warner, (D) Virginia:

"The Russian active measures efforts did not end on Election Day 2016. They were not only geared at the United States of America. We have seen Russia enacted measures take place in France. We've seen concerns raised in the Netherlands. We've seen concerns raised in Germany. And we need to be on guard."

7. Cutaway of press

8. SOUNDBITE (English) Sen. Mark Warner, (D) Virginia:

"I think there is a large consensus that they hacked into political files, released those files, in an effort to influence the election. We think they actively tried to at least test the vulnerabilities of 21 states' electoral systems."

++WHITE FLASH BETWEEN BITES++

9. SOUNDBITE (English) Sen. Richard Burr, (R) North Carolina:

"We can certifiably say that no vote totals were affected that the tallies are accurate. The outcome of the election based upon the counting votes. They they did not in any way shape or form that we've been able to find alter that."

Leaders of the Senate intelligence committee said Wednesday that they have not determined roughly nine months into their investigation whether Russia coordinated with the Trump campaign to sway the 2016 presidential election.

"The issue of collusion is still open," said the Republican committee chairman, Sen. Richard Burr, who along with the panel's top Democrat, Sen. Mark Warner, provided an update on a congressional investigation that was launched the same month as President Donald Trump was inaugurated.

More than 100 witnesses have been interviewed - including former Trump campaign chairman Paul Manafort and Trump's son-in-law Jared Kushner - and more than 100,000 pages of documents have been reviewed, Burr said.

The lawmakers said that though they have reached no conclusion about whether the campaign colluded with the Kremlin - the question also at the heart of a separate criminal investigation by special counsel Robert Mueller - their investigation has left no doubt about a multi-pronged Russian effort to meddle in American politics.

"The Russian intelligence service is determined, clever and I recommend every campaign and every elected official take this seriously," Burr said.

Warner later added that there was a "large consensus" that Russians had hacked into political files and strategically released them with the goal of influencing the election. He said Russian hackers had also tested the vulnerabilities of election systems in 21 states, though there's no evidence that any voting tallies were altered.

The news conference Wednesday was an effort by the committee to lay out some of what's been found so far as the 2018 midterm elections approach.

Washington, DC - 4 October 2017

1. Wide shot of US Senators Burr and Warner walking into Senate Press Gallery

2. SOUNDBITE (English) Richard Burr, US Senator (R) North Carolina:

"That the issue of collusion is still open, that we continue to investigate both intelligence and witnesses and that we're not in a position where we will come to any type of temporary finding on that until we've completed the process."

3. Cutaway of press.

4. SOUNDBITE (English) Richard Burr, US Senator (R) North Carolina::

"We have more work to do as it relates to collusion but we're developing a clearer picture of what happened. What I will confirm is that the Russian intelligence service is determined, clever and I recommend that every campaign and every election official take this very seriously as we move into this November's election. And as we move into preparation for the 2018 election."

5. Cutaway of press

6. SOUNDBITE (English) Richard Burr, US Senator (R) North Carolina:

"As it relates to the Steele dossier, unfortunately the committee has hit a wall. We have on several occasions made attempts to contact Mr. Steele, to meet with Mr. Steele, to include personally the vice chairman and myself as two individuals making that connection. Those offers have gone unaccepted. The committee cannot really decide the credibility of the dossier without understanding things like who paid for it? Who are your sources and sub sources?"

7. Cutaway of press

8. SOUNDBITE (English) Mark Warner, US Senator (D) Virginia:

"The Russian active measures efforts did not end on Election Day 2016. They were not only geared at the United States of America. We have seen Russia enacted measures take place in France. We've seen concerns raised in the Netherlands. We've seen concerns raised in Germany. And we need to be on guard."

9. Cutaway of press

10. SOUNDBITE (English) Mark Warner, US Senator (D) Virginia:

"I think there is a large consensus that they hacked into political files, released those files, in an effort to influence the election. We think they actively tried to at least test the vulnerabilities of 21 states' electoral systems."

11. Wide shot of press conference

12. SOUNDBITE (English) Richard Burr, US Senator (R) North Carolina:

"We can certifiably say that no vote totals were affected - that the tallies are accurate. The outcome of the election based upon the count of votes. They they did not in any way shape or form that we've been able to find, alter that."

13. Wide shot of press conference