Trump's Twitter undermines White House efforts to regroup

But White House spokeswoman Sarah Huckabee Sanders said that "in order to facilitate a swift and thorough examination of facts", Trump would not try to halt the Comey testimony.

Comey, whom Trump fired last month, is scheduled to testify publicly Thursday.

Those reports, which cited sources close to the ousted FBI director, said Trump asked Comey to pledge his loyalty to the president and to stop the investigation into former national security adviser Lt. Gen. Michael Flynn.

Chairman of the Senate Select Committee Richard Burr and Vice Chairman Mark Warner said in a statement May that Comey's testimony "will help answer some of the questions that have arisen since Comey was so suddenly dismissed by the president".

"I know the Senate Judiciary Committee has made a similar request of Mr. Comey and I support their request", Schumer said in remarks as the Senate reopened on Monday after a weeklong recess.

Burr also said that he believes Robert Mueller, the special counsel overseeing the Russian Federation probe, did not bar Comey from talking about anything the Federal Bureau of Investigation director had planned on revealing during the hearing.

Executive privilege is a presidential power that stems from the idea that the commander-in-chief should be able to enjoy honest conversations with his aides and advisers.

"Sooner rather than later, let's find out what happened and bring this to a conclusion", Blunt said on "Fox News Sunday".

Comey's appearance before the Senate Intelligence Committee as part of its Russia-related investigation will be his first public testimony since his firing on May 9.

The meeting with McCabe was not primarily about Comey's testimony, the senators said.

Comey, according to media reports, has noted that Trump had asked him to stop FBI investigations against former National Security Advisor, Lt Gen H R McMaster.

Short was also asked about the president's constant tweeting, which has repeatedly distracted from the White House's planned agenda, including this week's focus on infrastructure investments to fix the nation's crumbling roads, bridges and airports.

Comey is also likely to be asked by lawmakers about Trump's assertion that the former FBI chief told him three times that he was not under investigation as part of the federal probe into his campaign's possible Russian Federation ties.

But as long as President Donald Trump has a smartphone, no White House strategy is safe. "Arguably, Trump has himself breached that confidentiality", Harvard Law professor Noah Feldman told CNN.

"James Comey better hope that there are no "tapes" of our conversations before he starts leaking to the press", he tweeted in May.

  • Larry Hoffman