Donald Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE and Hillary Clinton Hillary Diane Rodham ClintonWhat Senate Republicans have said about election-year Supreme Court vacancies Bipartisan praise pours in after Ginsburg's death Trump carries on with rally, unaware of Ginsburg's death MORE are in a statistical tie in a head-to-head match-up for the presidency, a new national poll released Wednesday finds.

The Reuters/Ipsos poll showed Clinton with 41 percent support to Trump’s 40 percent. Nineteen percent of voters are still undecided.

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Trump is surging as the GOP's presumptive nominee since Ted Cruz Rafael (Ted) Edward CruzSenate Republicans face tough decision on replacing Ginsburg Cruz: Trump should nominate a Supreme Court justice next week Renewed focus on Trump's Supreme Court list after Ginsburg's death MORE and John Kasich exited race. Last week, Clinton, the Democratic front-runner, led Trump by about 13 points in the same poll.

Polls are showing a race between Trump and Clinton tightening in recent days.

The two are neck and neck in Ohio, Florida and Pennsylvania, a Quinnipiac poll released Tuesday found.

But Democrats are brushing off polls showing Clinton in a dead heat with Trump, citing his low approval ratings with important groups like Hispanics and casting doubt on polls conducted at this point in the cycle.

The poll was conducted from May 6 to 10 and surveyed 1,289 likely voters online. The margin of error was 3 percentage points.