Presumptive Republican presidential nominee Donald Trump is gaining on Democratic front-runner Hillary Clinton in a matchup that's increasingly likely in the general election, a recent poll has found. 

The hypothetical matchup between Clinton and Trump is shaping up to be closer than many might have expected, suggested the NBC News/SurveyMonkey weekly tracking poll conducted online May 9-15. The former secretary of state is leading the billionaire businessman by just 3 points this week, according to the poll, which surveyed 14,100 adults, including 12,507 who said they are registered to vote. 

Clinton's lead has narrowed from 5 points last week. The poll, which tracked the demographics of the candidates' supporters, showed Clinton leading among black voters, with 84 percent to just 9 percent for Trump, and with Hispanic voters 65 percent to 28 percent. Trump, meanwhile, led among white voters by 14 points, 53 percent to 39 percent. Clinton beat Trump among female voters as well, leading by 15 points, while the presumptive GOP nominee won men by an 11-point margin. The results of the poll have a margin of error of plus or minus 1.2 percentage points. 

While the November general election vote is a ways off, and a lot could change, the polls have increasingly shown Clinton's lead narrowing. The RealClearPolitics average of polls puts her lead at 5.7 percentage points over Trump in a hypothetical general election.

The poll found Clinton leads her Democratic primary competition, Vermont Sen. Bernie Sanders, by 14 points. And while the delegate math strongly favors Clinton at this point, she has remained on the campaign trail ahead of Tuesday's votes in Oregon and Kentucky. After her losses in Indiana and West Virginia, polling has indicated Clinton has a shot at winning the states voting Tuesday.