During a hearing on Tuesday before a joint House and Senate appropriations subcommittee, Rosenstein was asked whether he had seen any evidence of that.
Deputy Attorney General Rod Rosenstein says he has seen no evidence of good cause to fire the special prosecutor overseeing the Russian Federation investigation.
Sessions was testifying before the Senate intelligence committee, becoming the latest official to go before the panel as it investigates Russian meddling in the US election and potential coordination between the Trump presidential campaign and Russia. "I think it is", Ruddy said. "It is certainly theoretically possible that the attorney general could fire him, but that's the only person who has authority to fire him".
"It makes sense to point out any level of bias, to highlight any biases inherent in Mueller and this probe in order to force him to be transparent", Gingrich said.
Barry Bennett, a GOP strategist who served as an adviser to Trump's campaign, said he believed it would be too damaging for Trump to try to remove Mueller, but that he had concerns about the appearance that the probe was being politicized. "Mueller is going to have the full degree of independence he needs to conduct that investigation appropriately", Rosenstein said.More news: Messi, Neymar and Barcelona congratulate National Basketball Association champions Warriors
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Sessions was scheduled to testify later on Tuesday before the Senate Select Committee on Intelligence.
The comment came in response to questions from Democratic Sen.
The targeting of Mueller's credibility among some of Trump's most prominent supporters began after Comey's testimony last week.
As Mueller builds his legal team, Trump's allies have begun raising questions about the former Federal Bureau of Investigation director's impartiality, suggesting he can not be trusted to lead the probe.
Leahy told Rosenstein "you are not the witness who should be behind this table". He told MSNBC's "Morning Joe" that "I don't think the Congress would sit still and allow the president to pick his own investigator".
Lawmakers for weeks have demanded answers from Sessions, particularly about meetings he had last summer and fall with the Russian ambassador to the United States, Sergey Kislyak.