President Donald Trump urged voters to replace incumbent Sen. Joe Donnelly (D-Ind.)(shown above right) with his Republican challenger Mike Braun (above left) during a rally on Friday in Indianapolis, Indiana.

“In just four days, the people of Indiana are going to send Mike Braun to the United States Senate so that we can keep making American great again,” Trump told the crowd.

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“This election will decide whether we build upon the extraordinary prosperity we unleashed — or whether we let the radical Democrats take control of Congress, and take a giant wrecking ball to our economy and our future.”

The Indiana race has attracted a great deal of attention, and for good reason.

Republicans see a chance to flip a seat after the president won the state by 19 points during the 2016 presidential election.

Braun and Donnelly have also been neck-and-neck for months as November 6 quickly approaches.

Trump was joined by Vice President Mike Pence, former Indiana Hoosiers Coach Bobby Knight, and Indiana Gov. Eric Holcomb in a show of just how important this race is.

Related: Mike Braun Has Plan to Shake Up Joe Donnelly, Political Class

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Former President Barack Obama, for his part, will be rallying for Donnelly during a stop in Gary, Indiana, on Sunday.

“Mike Braun is not a career politician,” Trump said on Friday. “He’s a very successful businessman and a patriot who will fight every single day of his life for the people of Indiana. He’s a fighter. He’s a winner. He’s a very successful guy … He didn’t need this, I didn’t need this either, by the way.”

Trump had already rallied in support for Braun on August 30 and is planning to do so again on November 5. He has been holding rally after rally in key battleground states to stir support for conservative candidates.

Earlier in the day, the president held a rally in Huntington, West Virginia, for Republican Senate candidate Patrick Morrisey in his campaign to unseat incumbent Sen. Joe Manchin (D-W.Va.).

Donnelly and Braun have remained in a close race throughout the bulk of the midterm election cycle. ScottRasmussen.com has kept the race at a toss-up for months. The Mike Downs Center for Indiana Politics found in a poll last week that Braun has 40 percent support against Donnelly — who has 41 percent.

“A vote for Mike’s opponent, Joe Donnelly, is a vote to make ‘Crying Chuck Schumer’ the Senate majority leader,” Trump said. “We can’t do that. A vote for any Democrat this November is a vote to put the radical Democrats in charge of the House, the Senate and every congressional committee. That is not good for Indiana. It’s not good for our country.”

Donnelly is fighting to hold the seat for another six-year term after first winning it in 2012. Braun is touting his business experience and time as a member of the Indiana House of Representatives; he is founder and president of Meyer Distributing and owner of Meyer Logistics.

“If you want prosperity for your families, safety for your children and security for your country, vote for Mike Braun.”

Donnelly comes into the race claiming numerous accomplishments of his own, with his work on education, veterans, the economy and health care. He has also highlighted his connection to the state and experiences in running a small printing shop during his campaign as well.

He previously served three terms in the U.S. House of Representatives.

Related: Trump Tells Hoosiers He Needs Republican Mike Braun in the Senate

“We don’t want to go back to the Obama days of low wages, high unemployment, rising crime, open borders, far-Left judges, oppressive regulations, horrible, horrible, horrible trade deals, disastrous foreign policy,” Trump told the Indiana crowd. “If you want prosperity for your families, safety for your children and security for your country, vote for Mike Braun.”

Braun has argued there isn’t enough accountability in the federal government and his opponent is part of the problem. He’s positioned himself as an outside businessman who will disrupt the stagnant political class, much like the president — who also ran as an outsider businessman.

Donnelly and Braun also held their final debate this past Tuesday night.

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