Most of the 11 people subpoenaed, including Maggie Mulvaney, were listed on the permit for the January 6 rally.
"People died. Other people were severely injured. To say there was no risk is just wrong," said Trump's former chief of staff.
Since the riot, Maggie Mulvaney and others linked to the "Save American Rally" have attempted to distance themselves from the event.
"I've seen the president be presidential before…but something is very different now," said the former acting White House chief of staff.
The former White House chief of staff said Trump has "not been the same" since he lost the November presidential election.
"The legacy of the president was ruined yesterday," the former Trump administration official said.
The former White House chief of staff said the president was expressing his displeasure with the bill and that "Congress is broken."
"This is not a television program," Mick Mulvaney said.
Mulvaney noted that Trump "doesn't like losing," adding, "I would absolutely put him on the shortlist of people who are likely to run in 2024."
The president has insisted that testing in the U.S. is "much bigger and better" than other countries.
Mulvaney also said that the "deep state" is still trying to hinder Trump and expressed frustration that the president could not fire more obstructive officials.
President Donald Trump is no stranger to appearing on the big screen—and his impeachment trial playing out in the Senate is no exception.
"I think we ought to go through the right process," the lawmaker from Florida said.
Congressman Hakeem Jeffries, a House manager, pointed out that the Senate has conducted fifteen impeachment trials and there were witnesses at every single one.
The president was playing golf with professional John Daly while officials were trying to set up a call to have the aid released, according to The New York Times.
"Whether it's Mulvaney, Bolton, Giuliani, Pompeo—if they have to testify under oath, he has to leave," former White House Communications Director Anthony Scaramucci said on MSNBC.
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.
"It goes to a phrase we've all become familiar with in recent months, the idea of consciousness of guilt," Niall Stanage said.
Republican analyst Amanda Carpenter said she believes supporters of President Donald Trump could be planning to make acting White House Chief of Staff Mick Mulvaney the scapegoat for allegations levied at the president during the impeachment inquiry.
The close adviser to acting White House Chief of Staff Mick Mulvaney joins a number of other White House officials who have been instructed by the White House not to comply.
CNN host Victor Blackwell abruptly ended a Saturday panel about GOP impeachment strategies after a Republican harped on "debunked conspiracies" about Joe Biden and Hillary Clinton.
Ted Lieu, a Democratic congressman from California, has written a letter to White House Acting Chief of Staff Mick Mulvaney questioning a large exodus of cybersecurity staff.
The acting White House chief of staff is at risk of losing his job following a series of gaffes, with counselor Kellyanne Conway or Treasury Secretary Steven Mnuchin floated as possible replacements.
"I don't recall any conversations with the president about that phone call," the Republican Senate majority leader said.
"Very troubling," Representative Adam Levin told reporters outside the closed-door session.
"These [Republican] members are in a situation where they just can't defend the indefensible," former Representative Charlie Dent said.
"He's a good guy," Anthony Scaramucci argued, but said Mulvaney is "working for a terrible person."
The president was forced to U-turn over his plan to host the G7 Summit at one of his own properties.