President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE’s unpopularity in California appears to be having a significant drag on two vulnerable House Republicans racing to save their seats.

Reps. Dana Rohrabacher Dana Tyrone RohrabacherDemocrat Harley Rouda advances in California House primary Lawyers to seek asylum for Assange in France: report Rohrabacher tells Yahoo he discussed pardon with Assange for proof Russia didn't hack DNC email MORE and Steve Knight are both facing voters who say they are unlikely to vote for their incumbent representatives, according to a new poll from the University of California, Berkeley’s Institute of Governmental Studies.

And in both cases, voters said in the poll they were less likely to vote for the Republican lawmakers because of Trump.

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In Rohrabacher’s district, 86 percent of voters who disapprove of the president are unlikely to vote to reelect their congressman, the poll found.

In Knight’s district, that number rises to 90 percent. A majority of likely voters in both districts disapprove of Trump, according to the poll, which was reported on by The Sacramento Bee.

Two-thirds of registered voters in California say they disapprove of Trump, according to a survey by the same pollster last month.

Knight and Rohrabacher's races are both rated as toss-ups by the Cook Political Report.

Even though Knight’s district has a similar number of Democrats and Republicans and Rohrabacher’s district has more Republicans than Democrats, the strong distaste for Trump has left both congressmen facing an uphill climb, according to the poll.

Knight was hurt by his vote in favor of the tax law, which places a new limit on the deduction for state and local taxes and property taxes. According to the poll, over half of likely voters in the district said they were less likely to vote for Knight because of that vote. His backing for ObamaCare repeal-and-replace legislation was similarly unpopular.

Rohrabacher opposed the tax-cut bill.

California’s primary system calls for the two top finishers, regardless of party, to advance to the general election.