Rep. Fred Keller (R-Pa.) is expected to replace Rep. Justin Amash Justin AmashInternal Democratic poll shows tight race in contest to replace Amash Centrist Democrats 'strongly considering' discharge petition on GOP PPP bill On The Trail: How Nancy Pelosi could improbably become president MORE on the House Oversight and Reform Committee in the wake of the Michigan lawmaker leaving the Republican Party, multiple House GOP Steering Committee members told The Hill.

Amash submitted his letter to party leadership on Monday, officially resigning from the House Republican Conference. Under chamber rules, he has effectively resigned his position on the committee, which conducts oversight of the Trump administration.

The Michigan lawmaker, who has been a vocal critic of President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE and called for the president's impeachment, announced last week in a Fourth of July op-ed that he was leaving the GOP, saying the party no longer represented ideals he supported. He officially filed as an Independent with the clerk of the House on Tuesday.

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"Please accept this letter as formal notification that I am withdrawing my membership in the House Republican Conference, effective immediately, for the reasons outlined in my accompanying op-ed," Amash wrote to House Minority Leader Kevin McCarthy Kevin Owen McCarthyMcCarthy says there will be a peaceful transition if Biden wins GOP lawmakers distance themselves from Trump comments on transfer of power McCarthy claims protests in Louisville, other cities are 'planned, orchestrated events' MORE (R-Calif.) and House Republican Conference Chairwoman Liz Cheney Elizabeth (Liz) Lynn CheneyGOP lawmakers distance themselves from Trump comments on transfer of power Graham vows GOP will accept election results after Trump comments Liz Cheney promises peaceful transfer of power: 'Fundamental to the survival of our Republic' MORE (R-Wyo.) this week.

"Consistent with Clause 5(b) of Rule X of the Rules of the House of Representatives, I also am resigning from the Committee on Oversight and Reform," he added.

Keller, who won the special election for Pennsylvania's 12th Congressional District in May and appeared alongside Trump at a rally earlier this year, is also expected to be added to the House Education and Labor Committee.

The decision to add Keller to the committees still needs to be ratified before he is officially placed on the panels.