Speaker Nancy Pelosi Nancy PelosiPowell warns failure to reach COVID-19 deal could 'scar and damage' economy Overnight Defense: House to vote on military justice bill spurred by Vanessa Guillén death | Biden courts veterans after Trump's military controversies Intelligence chief says Congress will get some in-person election security briefings MORE (D-Calif.) and other top Democrats are calling on President Trump Donald John TrumpBarr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' Military leaders asked about using heat ray on protesters outside White House: report Powell warns failure to reach COVID-19 deal could 'scar and damage' economy MORE and Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellSenate Republicans signal openness to working with Biden Hillicon Valley: DOJ indicts Chinese, Malaysian hackers accused of targeting over 100 organizations | GOP senators raise concerns over Oracle-TikTok deal | QAnon awareness jumps in new poll The Hill's Campaign Report: Biden asks if public can trust vaccine from Trump ahead of Election Day | Oklahoma health officials raised red flags before Trump rally MORE (R-Ky.) to allow John Bolton John BoltonThe Hill's Morning Report - Sponsored by The Air Line Pilots Association - Pence lauds Harris as 'experienced debater'; Trump, Biden diverge over debate prep DOJ launches probe into Bolton book for possible classified information disclosures Gary Cohn: 'I haven't made up my mind' on vote for president in November MORE to testify in the upper chamber's impeachment trial after the former national security adviser said on Monday that he would comply with a subpoena.

Pelosi said in a tweet that Trump and McConnell have "run out of excuses" and that the Republican-controlled Senate must seek Bolton's testimony about the Trump administration's contacts with Ukraine.

"They must allow key witnesses to testify, and produce the documents Trump has blocked, so Americans can see the facts for themselves. The Senate cannot be complicit in the President's cover-up," the Speaker added using the hashtag "#DefendOurDemocracy."

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The President & Sen. McConnell have run out of excuses. They must allow key witnesses to testify, and produce the documents Trump has blocked, so Americans can see the facts for themselves.



The Senate cannot be complicit in the President's cover-up. #DefendOurDemocracy https://t.co/TQLJsfn0f5 — Nancy Pelosi (@SpeakerPelosi) January 6, 2020

Her tweet adds to renewed calls from top Democrats like Senate Minority Leader Charles Schumer Chuck SchumerDemocrats scramble on COVID-19 relief amid division, Trump surprise Pelosi, Schumer 'encouraged' by Trump call for bigger coronavirus relief package Schumer, Sanders call for Senate panel to address election security MORE (D-N.Y.), House Intelligence Committee Chairman Adam Schiff Adam Bennett SchiffOvernight Defense: House to vote on military justice bill spurred by Vanessa Guillén death | Biden courts veterans after Trump's military controversies Intelligence chief says Congress will get some in-person election security briefings Democrats, advocates seethe over Florida voting rights ruling MORE (D-Calif.) and others for witnesses in the Senate trial following Bolton's announcement.

"Since my testimony is once again at issue, I have had to resolve the serious competing issues as best I could, based on careful consideration and study. I have concluded that, if the Senate issues a subpoena for my testimony, I am prepared to testify," Bolton said in a statement.

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The timing of the former national security adviser's decision also adds pressure on Senate Republicans, particularly the more moderate members who have been mum about their position on calling in witnesses to testify in the upper chamber.

Moderates like Sens. Lisa Murkowski Lisa Ann MurkowskiGOP ramps up attacks on Democrats over talk of nixing filibuster OVERNIGHT ENERGY: House Democrats tee up vote on climate-focused energy bill next week | EPA reappoints controversial leader to air quality advisory committee | Coronavirus creates delay in Pentagon research for alternative to 'forever chemicals' House Democrats tee up vote on climate-focused energy bill next week MORE (R-Alaska) and Susan Collins Susan Margaret CollinsThe Hill's Campaign Report: Biden asks if public can trust vaccine from Trump ahead of Election Day | Oklahoma health officials raised red flags before Trump rally Gideon leads Collins by 12 points in Maine Senate race: poll Senate leaders quash talk of rank-and-file COVID-19 deal MORE (R-Maine) offered unusual rebukes of McConnell over his statement late last year about closely coordinating the upcoming Senate impeachment trial with the White House.

Both warned that they want the trial to be fair and impartial, although neither took a definitive position on calling in witnesses — as Democrats are demanding.

Democrats would need four Republican senators to side with them in order to subpoena witnesses.

Pelosi chose to delay passing along the two articles of impeachment that passed the House largely along party lines last month as leverage to press McConnell to concede to Democrats' demands of calling in witnesses, which they say will help ensure a fair trial.

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McConnell, who has wanted a speedy trial, has expressed resistance to the idea, but Bolton's statement may add pressure on the Kentucky Republican to reconsider.

Democrats also want to hear from acting White House chief of staff Mick Mulvaney Mick MulvaneyMick Mulvaney to start hedge fund Fauci says positive White House task force reports don't always match what he hears on the ground Bottom line MORE and Secretary of State Mike Pompeo Michael (Mike) Richard PompeoThe Hill's Morning Report - Sponsored by The Air Line Pilots Association - Pence lauds Harris as 'experienced debater'; Trump, Biden diverge over debate prep Trump's foreign policy successes confound his detractors It's time for a Jackson-Vanik Amendment for China MORE, among others who chose to side with the White House claims of absolute immunity and defy congressional subpoenas seeking their testimony during the House impeachment inquiry last year.

The Democratic-controlled House voted to impeach Trump last month for abusing his power, alleging that he withheld the promise of a White House meeting and nearly $400 million in U.S. aid as leverage to get Ukraine to open two politically motivated investigations, including one into former Vice President Joe Biden Joe BidenThe Memo: Warning signs flash for Trump on debates Senate Republicans signal openness to working with Biden National postal mail handlers union endorses Biden MORE, a leading 2020 rival.

House Democrats also charged Trump with obstruction of Congress after the White House refused to cooperate with the impeachment inquiry, which the president and his allies described as a partisan sham that was designed to hurt Trump heading into a presidential election.

The GOP-controlled upper chamber, however, is unlikely to vote to remove Trump from office.