Eliza Collins

USA TODAY

Corrections and clarifications: An earlier version of the following story misstated Donald Trump's poll number in July in the McClatchy-Marist poll.

Hillary Clinton had a 15-point lead over Donald Trump in a national poll out Thursday following the Republican nominee’s insults of the parents of a fallen soldier and otherwise rocky week in his campaign.

The former secretary of State gained ground in the McClatchy-Marist poll, and Trump lost support. Clinton had the support of 48% of those surveyed, and Trump had 33%. Last month, Clinton had 42% while Trump had 39%.

When third-party candidates are included, Clinton’s lead held strong. She had 45%, and Trump had 31%, Libertarian candidate Gary Johnson had 10% and Green Party candidate Jill Stein had 6%.

Clinton made gains with every ethnic and racial group, including whites and men, which Trump had led with previously.

The survey of 1,132 people was conducted via telephone Aug. 1-3. The margin of error was plus or minus 3.1 percentage points.

An NBC News/Wall Street Journal poll released Thursday afternoon also showed Clinton with a significant lead: She had 47% and Trump had 38%.

That margin has also grown since their poll last month, which had Clinton at 46% and Trump at 41%.

In a four-way matchup, Clinton held on to her lead with 43% while Trump had 34%. Johnson had 10% and Stein had 5%.

The telephone poll of 800 registered voters was conducted July 31-Aug. 3. It had a margin of error of plus or minus 3.5 points.

Convention 'bounce' ain't what it used to be