On Tuesday, the White House refused to comment on reports that President Donald Trump's senior adviser and son-in-law Jared Kushner tried to set up secret communications with Russia during Trump's presidential transition period.
"What your question assumes are a lot of facts that are not substantiated by anything but anonymous sources that are so far being leaked out," said White House Press Secretary Sean Spicer, rejecting the premise of a reporter's question.
In a series of tweets, Trump also discredited reports, calling them "fabricated lies" and "fake news."
On Sunday, Trump's Homeland Security secretary, John Kelly, defended the idea of such a secret communications channel on Sunday morning news shows, calling it "a smart thing."
Reports of contacts between Kushner and Russia have dogged the Trump administration for months, with the news that Kushner and Former National Security Adviser Michael Flynn met with the Russian Ambassador to the U.S. in December.
Kushner has volunteered to testify before the Senate Intelligence Committee to answer questions about communications with Russia.