The House is expected to impeach the president in a vote on Wednesday, and Senate leaders are now wrangling to decide the format of the subsequent trial.
Senator Chuck Schumer says he expects "some" of his Republican colleagues to say "that's fair," when they read his letter.
A representative for Republicans for the Rule of Law told Newsweek that the group targeted representatives who have shown a willingness to "assert their independence" of the president.
The former national security adviser has so far refused to testify to House investigators, even threatening legal action if he is subpoenaed.
In a vague tweet, Bolton said that America's "commitment to our national security priorities" were "under attack from within," prompting some Twitter users to urge the former national security adviser to testify before the impeachment committee.
White House Press Secretary Stephanie Grisham has claimed that former National Security Advisor John Bolton may not understand "how Twitter works" due to his "advanced age," and is mistaken about his claim that the White House froze him out of his account.
"Glad to be back on Twitter after more than two months," Bolton tweeted Friday morning. "For the backstory, stay tuned........"
MSNBC anchor Nicolle Wallace claimed that the potential impeachment inquiry testimony of former national security adviser John Bolton could be "the difference between conviction and no conviction in the senate," during a panel discussion on Monday.
Former National Security Adviser John Bolton became the latest ex-Trump administration official to sign a book deal this week.
The former national security adviser John Bolton is expected to be a no-show on Capitol Hill today just as 'Abominable' will be a no-show in Malaysia after producers refused to follow orders from the country's censors.
"We know you're not in custody (yet)," Conway, who is married to Trump's senior counselor Kellyanne Conway, tweeted.
The former national security adviser reportedly described Rudy Giuliani as a "hand grenade who's going to blow everybody up."
President Donald Trump demanded a smaller National Security Council this week in the wake of the whistleblower complaint.
Ex-White House national security adviser John Bolton rebuked President Donald Trump's repeated North Korea disarmament claims, declaring Monday that Kim Jong-Un "will never give up its nuclear weapons voluntarily."
Former White House National Security Adviser John Bolton was among several alarmed administration officials who urged President Trump to release the nearly $400 million in funds to Ukraine, officials said.
Kim Myong Gil said Friday he welcomed Trump's suggestion that a "new method" could achieve success in talks between Washington and Pyongyang.
The art-of-the-deal president might finally have a national security advisor who'll enforce his preferences instead of undermining them.
The former National Security Adviser also reportedly asserted that Trump's negotiations with Iran and North Korea are "doomed to failure."
"If I was going to the new national security adviser—and I won't be, I'm glad it's General Flynn who has that job and not me," Robert O'Brien said in 2016.
The California attorney has been serving as the Special Presidential Envoy for Hostage Affairs since 2018 and has held a smattering of other government positions since 2005.
The list includes a former deputy national security adviser, Vice President Mike Pence's security aide and a hostage negotiator.
Scaramucci has turned his very short tenure with the Trump administration into a profitable position for himself.
"We have a president who seems to not want to hear anything other than 'yes,'" Susan Rice told MSNBC.
"It's perhaps not the best way to find your next cabinet," Alisyn Camerota, who previously worked for Fox News, said.
The Daily Show host mocked the departure of the national security adviser, who disputes that he was fired, insisting instead that he quit the Donald Trump administration.
Trump announced Bolton's departure on Twitter on Tuesday, saying he had disagreed with "many" of his adviser's suggestions.
"Why are they doing it?" Harris Faulkner said. "Why are we seeing this play one against the other almost in terms of, you know, what the narrative is?"
"I offered to resign last night and President Trump said, 'Let's talk about it tomorrow,'" Bolton tweeted 12 minutes after Trump published a tweet implying the National Security Adviser was fired.
The president may already be tiring of a maximum pressure policy that has resulted in much less than its supporters predicted.