Stephen Schwarzman, a donor and an informal adviser to 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, plans to host a fundraiser with Sen. Mitt Romney Willard (Mitt) Mitt RomneyCrenshaw looms large as Democrats look to flip Texas House seat The Hill's Morning Report - Sponsored by Facebook - Republicans lawmakers rebuke Trump on election Trump dumbfounds GOP with latest unforced error MORE (R-Utah) Thursday to back Republicans in their reelection campaigns, a source familiar with the fundraiser confirmed to The Hill.

Schwarzman will host the fundraiser at his apartment for a small group of donors, sources familiar with the fundraiser told CNN. The money obtained from the fundraiser intends to go to Romney’s political action committee, Believe in America PAC, as well as the National Republican Senatorial Committee and three GOP Senate campaigns.

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Schwarzman will support Romney at a time when the Utah senator is distinguishing himself from the president. Romney has been one of Trump’s loudest critics within the Republican Party in the past few weeks, condemning the president for his decision to remove U.S. troops from Syria and for asking the Ukrainian president to look into former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE and his son.

The Utah senator dismissed any suggestion that he plans to persuade other GOP lawmakers to support impeachment in an interview with Axios Sunday.

Schwarzman previously donated about $850,000 to Trump’s inauguration and PACs, according to CNN and the Center for Responsive Politics. He has also funded some of Romney’s political races, amounting to about $94,200 total, including his 2018 Senate run, for which he and his wife donated the maximum. Schwarzman also endorsed Romney for president in 2012.