President-elect Donald Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE will headline a "get out the vote" rally in Baton Rouge, La., on Friday, one day before the state's Senate runoff election.

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State Treasurer John Kennedy (R) will face Foster Campbell (D) in the runoff. If Kennedy wins, the Republicans will boost their Senate ranks to 52 seats, while Democrats currently hold 48 seats.

Trump won Louisiana by 20 points in the November presidential election, and 60 percent of the state’s electorate voted for one of the Republican Senate candidates in the state’s jungle primary.

Trump and Vice President-elect Mike Pence have endorsed Kennedy’s bid, and Pence stumped with the GOP Senate candidate over the weekend in New Orleans.

Members of Louisiana's congressional delegation, including House Majority Whip Steve Scalise (R), are also expected at the Trump event.