Poll: Trump within 1 of Clinton nationally
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Donald TrumpDonald John TrumpJulián Castro: It's time for House Democrats to 'do something' about Trump Warren: Congress is 'complicit' with Trump 'by failing to act' Sanders to join teachers, auto workers striking in Midwest MORE is within a single point of Hillary ClintonHillary Diane Rodham ClintonMissing piece to the Ukraine puzzle: State Department's overture to Rudy Giuliani On The Money: Trump downplays urgency of China trade talks | Chinese negotiators cut US trip short in new setback | Trump sanctions Iran's national bank | Survey finds Pennsylvania, Wisconsin lost the most factory jobs in past year Meghan McCain, Ana Navarro get heated over whistleblower debate MORE nationwide, according to a new poll.

Clinton has 41 percent to Trump's 40 percent, a Morning Consult survey released Tuesday said.

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Another 19 percent don’t know or have no opinion on who they back in a head-to-head match-up.

Clinton, the presumptive Democratic presidential nominee, keeps her slim lead when pollsters also ask about Libertarian presidential nominee Gary JohnsonGary Earl JohnsonTrump challenger: 'All bets are off' if I win New Hampshire primary Scaramucci assembling team of former Cabinet members to speak out against Trump Progressive Democrats' turnout plans simply don't add up MORE.

In that scenario, Clinton has 38 percent support to 37 percent for Trump, the presumptive GOP presidential nominee, and 11 percent for Johnson.

Morning Consult conducted its poll of 2,001 registered voters via interviews from June 30 to July 4. It has a margin of error of 2 percentage points.

The last version of the same poll, from late June, showed Clinton at 44 percent and Trump at 39 percent.