Former Democratic Rep. Artur Davis (Ala.) will speak at the Republican National Convention later this month in Tampa, Fla., the Republican National Committee (RNC) announced Thursday.

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Davis co-chaired President Obama's 2008 campaign and seconded his nomination at that year’s Democratic National Convention, but aligned himself with Republicans after losing a Democratic gubernatorial primary in 2010.

Davis campaigned with Mitt Romney on Wednesday in Virginia.

The RNC also announced speaking slots for four former potential vice presidential candidates: Sen. Kelly AyotteKelly Ann AyotteBiden likely to tap Robert Califf to return as FDA head Poll: Potential Sununu-Hassan matchup in N.H. a dead heat  Democrats facing tough reelections back bipartisan infrastructure deal MORE (N.H.), Sen. Rob PortmanRobert (Rob) Jones PortmanMcConnell gets GOP wake-up call Biden shows little progress with Abraham Accords on first anniversary The Hill's Morning Report - Presented by Facebook - After high drama, Senate lifts debt limit MORE (Ohio), Louisiana Gov. Bobby Jindal and Virginia Gov. Bob McDonnell. Florida Rep. Connie Mack, who will face Sen. Bill NelsonClarence (Bill) William NelsonNASA adviser quits after request to change name of James Webb telescope denied NASA won't rename James Webb Space Telescope despite controversy FAA unveils new system to reduce planes' times on taxiway MORE (D-Fla.) in a bid for Senate later this year, will also speak.

“This exciting group of headliners includes two successful governors, two outstanding senators, the next senator from our convention state and a former co-chairman of the 2008 Obama campaign,” RNC Chairman Reince Priebus said in a statement. “The perspectives and ideas they bring to the convention stage will show all Americans that Romney and Ryan are the ticket to a better future. Former Congressman Davis especially will give voice to the frustration and disappointment felt among those who supported President Obama in 2008 and are now hungry for a new direction.”

New Jersey Gov. Chris Christie (R) will deliver the keynote address and freshman Florida Sen. Marco RubioMarco Antonio RubioRepublicans would need a promotion to be 'paper tigers' Defense & National Security — Military starts giving guidance on COVID-19 vaccine refusals Blinken pressed to fill empty post overseeing 'Havana syndrome' MORE (R) will introduce Romney before the presumptive nominee's own speech at the convention.