Washington (CNN) Hillary Clinton has widened her lead over Donald Trump to 10 points in the wake of the Democratic convention, according to a new national poll.

Clinton leads Trump 49% to 39% in a head-to-head Fox News survey released Wednesday. In a three-way race including Libertarian Gary Johnson, Clinton leads 44% to 35%, with Johnson claiming 12%.

Clinton has enjoyed a bounce following her convention last week, and the Fox News survey shows one of the largest leads in general election polls yet. A CNN/ORC poll this week showed Clinton with a 9-point edge in a head-to-head matchup with Trump.

When Fox polled voters in late June -- before both conventions -- Clinton was up only six points, 44% to 38%.

Voters also weighed in on the controversy surrounding Trump after he disparaged the Muslim family of a fallen US soldier.

Sixty-nine percent of respondents familiar with the comments declared Trump's criticism in response to the family's speech against Trump at the Democratic convention "out of bounds," compared to 19% who said it was "in bounds."

Republicans are about evenly split on the back-and-forth, with 41% saying similarly while 40% of Republicans saying Trump's response is "in bounds."

Fox surveyed 1,022 registered voters from Sunday to Tuesday, and the poll has a margin of error of plus or minus 3 percentage points.