Hillary Clinton is ahead of Donald Trump by eight points in the newest national poll, released Sunday by the Washington Post and ABC News.

Clinton leads Trump 50-42 percent among registered voters and 51-44 percent among likely voters. With the other candidates thrown into the mix, Clinton is ahead of Trump 45-37 percent, with Libertarian Gary Johnson at 8 percent and Green Party candidate Jill Stein at 4 percent.

In a poll taken by the news organizations before the conventions, Clinton was ahead by 4 points in a four-way matchup.

The poll has Clinton in a better position than a Reuters poll released Saturday, which put her ahead by only three points.

The new poll suggests Trump's battle with Khizr and Ghazala Khan, a Muslim couple who spoke at the Democratic convention, has hurt him. Seventy-four percent said they disapproved of how he handled things, with 56 percent saying they strongly disapproved.

The survey of 1,002 adults was conducted by phone from Monday through Thursday of last week. The margin of error is plus or minus 3.5 points for all adults and plus or minus 4 points for the sample of 815 registered voters.