Clinton-Trump race tighter than ever

Hillary ClintonHillary Diane Rodham ClintonTrump rips Krugman, NYT after columnist writes GOP no longer believes in American values Klobuchar jokes to Cuomo: 'I feel you creeping over my shoulder' but 'not in a Trumpian manner' Dems seek to rein in calls for impeachment MORE and Donald TrumpDonald John TrumpRussia's election interference is a problem for the GOP Pence to pitch trade deal during trip to Michigan: report Iran oil minister: US made 'bad mistake' in ending sanctions waivers MORE are the closest they've ever been in an online tracking poll of their hypothetical general election match-up.

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Clinton leads the presumptive GOP presidential nominee by just 2 points, 47 to 45 percent, in the SurveyMonkey Election Tracking survey released Wednesday night.

An increasing number of voters surveyed said Trump can win, 46 percent, compared to the Democratic presidential front-runner at 47 percent. Clinton held a 9-point edge last week.

Pollsters also found that nearly a third of Republicans think their party will remain divided until November, despite Trump's status as the party's presumptive nominee.

Still, a majority of those in both parties, 53 percent of Republicans and 55 percent of Democrats, think their parties will unite by November.

The online survey of 12,969 registered voters doesn't have a margin of error. It was conducted between May 23 and 29.

Broader opinion polls in the high-stakes race have drawn questions over whether they can accurately predict the match-up between Trump and Clinton.