Clinton's lead shrinks to 5 points in national poll
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Hillary ClintonHillary Diane Rodham ClintonGOP struggles with retirement wave Overnight Energy: Trump to revoke California's tailpipe waiver | Democrats propose bill to revoke Trump endangered species rollback | Trump officials finalize rule allowing fewer inspectors at pork plants Mark Mellman: The most important moment in history? MORE’s lead over Donald TrumpDonald John TrumpJimmy Carter: 'I hope there's an age limit' on presidency White House fires DHS general counsel: report Trump to cap California trip with visit to the border MORE has narrowed to single digits in a new national poll.

Clinton tops her likely general election rival by 5 points, 45.6 to 40.4 percent, in the USA Today/Suffolk University poll released on Monday.

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Two months ago, Clinton led the businessman by double digits, 50 to 39 percent, in that poll.

Including Libertarian 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 and Green Party candidate Jill Stein as potential options drops Clinton's lead over Trump to 4 points, 39 percent to 35 percent.

Monday's poll comes as both Clinton and Trump have solidified their standing as the presumptive Democratic and Republican nominees, respectively, despite their negative favorability ratings.

Fifty-three percent have an unfavorable opinion of Clinton, 60 percent have an unfavorable opinion of Trump, and 1 in 5 — or roughly 20 percent — have a negative opinion of both candidates, according to the poll.

David Paleologos, director of the Suffolk University Political Research Center, told USA Today that voters who have a negative opinion of Clinton and Trump could end up "holding their noses and picking one of them or opting for a third-party option. Or staying home, come November."

According to the poll, 61 percent of likely voters feel "alarmed" about the election, while 23 percent are "excited" and another 9 percent say they are "bored."

The USA Today/Suffolk University poll of 1,000 likely voters was conducted by landline and cellphone from June 26 to 29. It has a margin of error of 3 percentage points.

A RealClearPolitics average of general election polling has Clinton leading Trump by 4.5 percentage points, 44.8 to 40.3.

Monday's poll does shed some light on whom likely GOP or Democratic voters want their respective candidates to pick as a running mate ahead of the conventions later this month.

By a 3-1 margin, Republicans want to Trump to pick someone with "Washington experience." Likely Democratic voters want Clinton to pick a progressive running mate by a 2-1 margin.

This report was updated at 12:43 p.m.