Hillary Clinton also made strides with two crucial demographic groups that had previously favored Donald Trump: whites and men. | Getty National poll: Clinton up 15 over Trump

A new poll puts Hillary Clinton 15 percentage points ahead of Donald Trump among registered voters, according to the latest McClatchy-Marist survey, released on Thursday.

The poll, which shows Clinton leading her Republican rival 48 percent to 33 percent, indicates a dramatic surge for the Democratic nominee since last month's edition of the survey, when she led Trump by just 42 percent to 39 percent.


Clinton made strides with two crucial demographic groups that had previously favored Trump: whites and men. She leads the Manhattan billionaire by 8 percentage points among men and is up by 3 points among white voters, 41 percent to 39 percent.

“This is coming off the Democratic convention, where a bounce is expected,” said Lee Miringoff, director of the Marist Institute for Public Opinion. “What you don’t want is to have the worst week of your campaign."

Marist surveyed 1,132 adults from Aug. 1 to Aug. 3 via landlines and cell phones with live interviewers, with a margin of error of plus or minus 2.9 percentage points. For the sample of 983 registered voters, the margin of error is plus or minus 3.1 percentage points.