Former national security adviser John Bolton John BoltonJudge appears skeptical of Bolton's defense of publishing book without White House approval Maximum pressure is keeping US troops in Iraq and Syria Woodward book trails Bolton, Mary Trump in first-week sales MORE Saturday announced he would resume the John Bolton PAC and John Bolton Super PAC, his first political moves since he was fired from the White House.

In its first move, Bolton’s PAC will endorse and donate $10,000 each to Sens. Tom Cotton Tom Bryant CottonThe Hill's 12:30 Report: Trump stokes fears over November election outcome The Hill's Morning Report - Sponsored by Facebook - Trump previews SCOTUS nominee as 'totally brilliant' Abortion stirs GOP tensions in Supreme Court fight MORE (R-Ark.), Cory Gardner Cory Scott GardnerBreaking the Chinese space addiction Trump dumbfounds GOP with latest unforced error Billionaire who donated to Trump in 2016 donates to Biden MORE (R-Colo.) and Thom Tillis Thomas (Thom) Roland TillisOvernight Energy: Trump officials finalize plan to open up protected areas of Tongass to logging | Feds say offshore testing for oil can proceed despite drilling moratorium | Dems question EPA's postponement of inequality training On The Trail: Making sense of this week's polling tsunami Feds say offshore testing for oil can proceed despite drilling moratorium MORE (R-N.C.) and Reps. Adam Kinzinger Adam Daniel KinzingerFox News reporter defends confirming Atlantic piece despite Trump backlash: 'I feel very confident' GOP lawmaker defends Fox reporter after Trump calls for her firing Lindsey Graham: 'QAnon is bats--- crazy' MORE (R-Ill.) and Lee Zeldin Lee ZeldinDCCC reserves new ad buys in competitive districts, adds new members to 'Red to Blue' program Overnight Defense: House panel probes Pompeo's convention speech | UN council rejects US demand to restore Iran sanctions | Court rules against Pentagon policy slowing expedited citizenship The Hill's 12:30 Report: Republicans conduct in-person convention roll call MORE (R-N.Y.).

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“The John Bolton PAC and John Bolton Super PAC seek a strong, clear, and dependable U.S. national security policy, resting on constancy and resolve,” Bolton, a foreign policy hawk, said in a statement. “The experience that these incumbent members of Congress have provides them with a remarkable understanding and knowledge of the threats we face from international terrorism and rogue regimes such as Iran and North Korea.”

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 fired Bolton this week, saying his "services are no longer needed at the White House."

Trump cited strong disagreements “with many of his suggestions.” Bolton rejected the idea that he was dismissed, maintaining that he resigned.

I offered to resign last night and President Trump said, "Let's talk about it tomorrow." — John Bolton (@AmbJohnBolton) September 10, 2019

Trump and Bolton were known to have clashed on an array of foreign policy issues, most notably over the president’s openness to meeting with Iranian leaders.

Despite Trump’s sway over the GOP, Republicans on Capitol Hill expressed dismay at Bolton’s ouster, signaling his firing may not have made him persona non grata within the GOP.

“His view was not always the same as everybody else in the room. That’s why you wanted him there. The fact that he was a contrarian from time to time is an asset, not a liability,” 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) told reporters Tuesday. “I’m very, very unhappy to hear that he’s leaving. It is a huge loss for the administration in my opinion and for the nation.”