Andrew Ogles

Representative Andy Ogles, Republican of Tennessee, faces a more competitive race than expected in the state’s primary election on Thursday, after a last-minute influx of outside political spending and a surprise endorsement for his rival.

Mr. Ogles, a two-term congressman, has President Trump’s endorsement but also carries some political baggage. He has been criticized for inflammatory anti-Muslim and anti-immigrant comments, and investigated for campaign finance issues.

Charlie Hatcher, a former state commissioner of agriculture and Mr. Ogles’s primary challenger, was endorsed on Tuesday by Bill Lee, Tennessee’s outgoing Republican governor and a longtime friend.

“Charlie has stood with President Trump since Day 1,” Mr. Lee said in a video he posted on social media.

The late endorsement could give Mr. Hatcher an additional boost on Election Day, though the governor’s support came after thousands of Tennessee Republicans had already cast their ballots in early voting.

“As farmers and businessmen, we both understand the value of hard work, responsible leadership and getting the job done,” Mr. Hatcher said in a statement. “In Congress, I will work hard, serve people and get the job done by pursuing sensible, problem-solving solutions.”

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