President Trump reiterated Monday his support for Luther Strange a day ahead of the Alabama Senate special election primary.

"Luther Strange of the Great State of Alabama has my endorsement. He is strong on Border & Wall, the military, tax cuts & law enforcement," Trump tweeted Monday morning.

Luther Strange of the Great State of Alabama has my endorsement. He is strong on Border & Wall, the military, tax cuts & law enforcement. — Donald J. Trump (@realDonaldTrump) August 14, 2017

Rep. Mo Brooks, R-Ala., another conservative in the running, pleaded with Trump last week to rescind his endorsement of Strange and instead endorse Brooks, a House Freedom Caucus member.

"I completely agree, Mr. President. McConnell & Strange don't support your agenda. I do. Reconsider endorsement @realDonaldTrump? #DitchMitch," Brooks tweeted Aug. 9.

The primary is Tuesday. Strange, Brooks, and former chief justice of the Alabama Supreme Court Roy Moore are vying for the GOP nomination. The top two winners will advance to a run-off if no one is able to get 50 percent of the vote.

The winner in the general election will replace Attorney General Jeff Sessions. Strange was appointed in February to fill Sessions' seat.