Republican John Kennedy is projected to win the Louisiana Senate runoff election, giving the GOP a 52-seat majority in the upper chamber.

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Republican National Committee (RNC) co-chair Sharon Day heralded Kennedy's victory Saturday evening, saying it "caps a year of historic Republican wins up and down the ballot."

"And with 52 seats in the U.S. Senate, we are excited for Republicans to confirm a conservative Supreme Court justice and begin working with President-elect Trump to pass an agenda of change for the American people," she said in a statement.

Louisiana GOP Chairman Roger Villere said Kennedy's victory showed that "the Republican brand continues to be the brand of choice for Louisiana voters, with voters choosing a Republican over a Democrat in 16 of the last 17 statewide elections."

"We look forward to working with Senator-elect Kennedy to drain the swamp in Washington, DC, protect the lives of the unborn, and balance the federal budget," he said.

"Senate Republicans are ready to lead and we look forward to John joining our team," McConnell said in a statement.

Congratulations to Senator-elect @JohnKennedyLA on his victory tonight in Louisiana. He will do great work in the Senate to #MAGA. — Mike Pence (@mike_pence) December 11, 2016

Kennedy, who had previously run unsuccessfully for Senate twice, ran well ahead of Campbell in polling throughout the race. Trump won Louisiana by 20 points, and 60 percent of the state’s electorate voted for one of the Republican Senate candidates in the November jungle primary.

Trump and Pence endorsed Kennedy ahead of the runoff and made last-minute visits to the state to rally for him.

Republicans invested heavily in the race, even with Kennedy having the upper hand. The National Republican Senatorial Committee (NRSC) opened 10 field offices statewide and went up with a six-figure TV ad buy.

Democrats were hoping to pull off another statewide win following Gov. John Bel Edwards’ (D) election last year, and sought to end the year on a high note after devastating losses up and down the ballot on Election Day.

Campbell raised $2.5 million in the most recent campaign filing, outpacing Kennedy by $1 million. A super-PAC backing his bid ran an ad claiming that Kennedy, a former Democrat, previously supported abortion rights.

Campbell is anti-abortion rights. Kennedy pushed back in an interview, saying he “never supported abortion.”

But the Democratic Senatorial Campaign Committee (DSCC) declined to invest in the race, after only flipping two Senate seats in November and failing to take over the majority.

Kennedy’s win caps off the final race of the 2016 cycle and gives Republicans further bragging rights after clinching the White House and preserving majorities in both chambers of Congress a month earlier.

Updated: 10:51 p.m.