Election analyst Henry Olsen predicted on Monday that President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE will lose many GOP voters in the midterm elections, despite the growing economy.

"I think the midterms are going to be about Trump's personality and the direction and values that Trump is projecting," Olsen, a senior fellow at the conservative Ethics and Public Policy Center, told Hill.TV's Joe Concha on "What America's Thinking."

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"I think you're going to see probably the lowest bump from a boom economy in Republican midterm figures that we've seen in the last 30 or 40 years, and it's all about Trump's polarizing personality and Trump's polarizing issues," he continued.

"There's a lot of Republicans who will say, 'Yeah, we have a good economy, but I'm just going to vote to get that guy out and to send a message that I don't like him.'"

The Labor Department said on Friday that the U.S. unemployment rate fell to 3.9 percent in July from 4 percent in June as employers added 157,000 jobs. The gains were lower than expected, with economists predicting payroll gains of about 190,000 for July. But the general trends have been positive, and the economy grew at a robust 4.1 percent rate in the second quarter.

— Julia Manchester