Charles E. Grassley, (R-Iowa), chairman of the Senate Judiciary Committee, said Wednesday he did not think McCabe should run the Federal Bureau of Investigation even for the short term because of his wife's involvement in Democratic politics in Virginia.
"Director Comey should be here this morning, testifying to the American people about where the investigation he's been running stands", said another Democrat, Ron Wyden of Oregon.
He called it a "highly significant investigation".
Several senators asked McCabe if he could confirm or deny Trump's assertion that Comey had informed the president "on three separate occasions" that he is not under investigation by the Department of Justice, which is conducting a probe of Russian meddling in last year's USA presidential election.
Warner asked McCabe if he would commit to informing the committee of any political interference in the Russian Federation investigation, and McCabe responded, "I absolutely do".More news: Lakers to meet with, interview De'Aaron Fox
"Sir, I can't comment on any conversations the director may have had with the president", McCabe responded.
The Senate intelligence committee on Wednesday subpoenaed former Trump national security adviser Michael Flynn for documents related to its investigation into Russia's election meddling.
McCabe also vowed that he will not communicate with the White House about the Russian Federation investigation.
But Rosenstein's own role in Comey's firing became increasingly murky Wednesday. "I believe we have the adequate resources to do it and I know that we have resourced that investigation adequately", he said. One official said Trump asked Rosenstein and Sessions for their views on Comey, then asked the deputy attorney general to synthesize his thoughts in a memo.
Over the next 24 hours, Rosenstein reportedly threatened to resign - after only two weeks on the job - for being used as the administration's fall guy. Senate aides have told NPR that Comey met with key members just before he was sacked. Comey had not allowed the White House to preview his testimony beforehand, which Trump and his aides considered "an act of insubordination", according to Reuters.More news: Penguins Put Capitals on Brink
White House and other USA officials insisted on anonymity to disclose private conversations.
A farewell letter from Comey that circulated among friends and colleagues said he does not plan to dwell on the decision to fire him or on "the way it was executed".
Trump is only the second president to fire an Federal Bureau of Investigation director, underscoring the highly unusual nature of his decision. "That's a question I would have to refer you to the Department of Justice".
The White House is considering naming Mike Rogers FBI director.
"Nobody wants this to be finished and completed more than us", she said.More news: Trump, top Russia envoy to meet at White House
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