The Alabama GOP Senate primary will be decided in a June 21 runoff election after none of the top three candidates nabbed more than 50% of the vote.

Katie Britt and Rep. Mo Brooks emerged as front-runners. Military veteran and businessman Mike Durant didn't make the cut after a dramatic primary campaign that saw former President Donald Trump withdraw his endorsement of Brooks after he fell in the polls in March.

KATIE BRITT HAMMERS MIKE DURANT ON GUNS IN NEW ALABAMA GOP SENATE PRIMARY AD

Britt, former chief of staff for Sen. Richard Shelby, whose retirement opened the seat, led the polls and was the top vote-getter Tuesday night. Brooks, a House member since 2011, and former Army pilot Durant battled for second place. Despite Trump's ire at Brooks for not fully supporting his election fraud claims, Brooks surged in popularity shortly before the primary.

Despite Brooks and Trump's dramatic breakup and Trump's indications that he was going to endorse another candidate, that endorsement never materialized, though Britt and Durant both courted it. Brooks billed himself as the only true conservative in the race and accused the Republican establishment of trying to sabotage his chances.

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The winner of the runoff will face Democratic nominee Will Boyd in the general election and will likely sail to victory due to the state's heavy Republican lean.