Page, who has been under fire for exchanging anti-Trump text messages with Federal Bureau of Investigation agent Peter Strzok during the 2016 presidential election, was subpoenaed by House Judiciary Chairman Bob Goodlatte, according to reports. If she doesn't, the Republicans said, they will initiate the contempt process at 10:30 a.m. Friday.
He warned of unspecified action by the committees to force her to testify, leaving Page at potential risk of a contempt of Congress citation.
He added: 'If she wants to come plead the Fifth, that's her choice. "We will do what we need to do to protect this branch of government".
It appears neither Page nor Strzok have had access to a transcript of the deposition.
Page's lawyer Amy Jeffress told CBS News' Paula Reid that she and Page on Tuesday went to the Federal Bureau of Investigation, her former employer, to review the materials that were sent to Congress, but they were not shown any documents after waiting more than three hours.
Trump tweeted Wednesday: "Ex-FBI LAYER Lisa Page today defied a House of Representatives issued Subpoena to testify before Congress!" "We will hold her in contempt and that's a serious matter".
"Congressional subpoenas for testimony are not optional".
But New York Rep. She suggested on Monday that it was still unclear whether Page would appear, saying in a statement that they were "still waiting to work out a reasonable date" for the interview and waiting on documents from the Federal Bureau of Investigation to prepare. Her lawyer, Amy Jeffress, said in a statement that they are "still waiting to work out a reasonable date" for the interview. "She has offered to voluntarily appear before the Committees later this month".
The move by Page's attorney was a rare moment of pushback, as Republicans and the President have continued to hold up Page and Strzok as Exhibit A of political bias infecting the nation's premier law enforcement agency.More news: Neville thought 3 England stars would struggle at World Cup
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Judiciary committee chair Bob Goodlatte (R-Va.) didn't buy it. Trump said of the decision.
"She has been in complete defiance of cooperation with the House Judiciary Committee and the Oversight and Government committee for seven months now", Goodlatte said. "We've been talking to her attorney for over a month".
House Republicans have suggested the Federal Bureau of Investigation was conspiring against Trump during and after his presidential campaign, and the two committees are investigating decisions made by the agency and the Justice Department during the 2016 presidential election.
Lisa Page, pictured in January, was due to be interviewed by two House committees Wednesday.
Republicans have said they disagree with that conclusion, which will likely be a significant focus of Thursday's public hearing.
Some former Federal Bureau of Investigation and Justice Department officials say the tactics observed in recent months illustrate a clear desire by House Republicans to score political points instead of genuine fact-finding.
Lisa Page has ignored a subpoena from Congressional investigators who have abandoned the Russian Federation investigation and pivoted to investigating the FBI instead.
"The Committees would be asking Lisa about materials she has not yet been shown", the lawyer continued.
The committees are interested in Page as part of their investigation into what they say is bias at the Justice Department. Jeffress said they are also still waiting on documents from the Federal Bureau of Investigation to prepare.