Donald Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE edges out Hillary Clinton Hillary Diane Rodham ClintonJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Momentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina MORE by 3 percentage points in a hypothetical general election match-up, according to a new Fox News poll.

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Trump has 45 percent support, while Clinton, Democratic front-runner for president, trails with 42, putting her just within the poll's margin of error.

Clinton rival Bernie Sanders Bernie SandersNYT editorial board remembers Ginsburg: She 'will forever have two legacies' Two GOP governors urge Republicans to hold off on Supreme Court nominee Sanders knocks McConnell: He's going against Ginsburg's 'dying wishes' MORE, meanwhile, leads Trump 46 to 42, according to the same poll.

The presumptive GOP nominee is buoyed by his support among whites, leading Clinton 55 to 31 percent. That margin grows among whites without a college degree, 61 percent of whom favor Trump, while just 24 percent back Clinton.

But the real estate mogul still struggles with women voters, half of whom back Clinton, and just 36 percent support Trump.

The former secretary of State also holds commanding leads Trump among blacks, 90 to 7 percent, and Hispanics, 62 to 23 percent.

The poll surveyed 1,021 registered voters from May 14 to 17. It has a margin of error of 3 points.