President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE on Sunday took aim at Speaker Nancy Pelosi Nancy PelosiDemocratic senator to party: 'A little message discipline wouldn't kill us' Overnight Health Care: New wave of COVID-19 cases builds in US | Florida to lift all coronavirus restrictions on restaurants, bars | Trump stirs questions with 0 drug coupon plan Overnight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds MORE (D-Calif.) as she led a bipartisan congressional delegation to Jordan to discuss the administration's recent decision to pull troops from Syria.

"Pelosi is now leading a delegation of 9, including Corrupt Adam Schiff Adam Bennett SchiffSchiff to subpoena top DHS official, alleges whistleblower deposition is being stonewalled Schiff claims DHS is blocking whistleblower's access to records before testimony GOP lawmakers distance themselves from Trump comments on transfer of power MORE, to Jordan to check out Syria. She should find out why Obama drew The Red Line In the Sand, & then did NOTHING, losing Syria & all respect. I did something, 58 missiles. One million died under Obama’s mistake!" Trump tweeted.

Pelosi is now leading a delegation of 9, including Corrupt Adam Schiff, to Jordan to check out Syria. She should find out why Obama drew The Red Line In the Sand, & then did NOTHING, losing Syria & all respect. I did something, 58 missiles. One million died under Obama’s mistake! — Donald J. Trump (@realDonaldTrump) October 20, 2019

Trump in his tweet was referring to former President Obama's vow to use military force against the Syrian government if it used chemical weapons against rebel forces in Syria. Obama eventually backed away from that promise.

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Trump, who has frequently criticized his predecessor's decision to not use military force against Syrian President Bashar Assad, has become increasingly critical of Pelosi, who formally launched an impeachment inquiry over his dealings with Ukraine.

Republican leadership joined Democrats this week to condemn Trump's decision to pull U.S. forces out of northeastern Syria, which was subsequently invaded by Turkish-backed forces in an effort to destroy or drive off Kurdish militant groups that aided the U.S. coalition against ISIS.

The House last week voted to formally rebuke Trump over his decision.

The president's anger over the vote erupted last week in a White House meeting with Democratic leadership, which resulted in both the president and Pelosi accusing each other of "melting down" in the hours following the meeting.