Hillary Clinton's post-Democratic National Convention bump in the polls is holding.

In a new NBC News/SurveyMonkey Weekly Election Online Tracking poll released Tuesday, Clinton has an 8-point lead over Donald Trump among registered voters, 50-42.

That's virtually unchanged from her 9-point lead last week, and is similar to the lead she has held since the end of July.

In a four-way matchup, Clinton holds a 5-point lead over the Republican presidential nominee, 43-38. Libertarian nominee Gary Johnson gets 11 percent, and Green Party nominee Jill Stein gets 5 percent.

Clinton's lead is attributed to minority voters, and a closing gap among white voters. She leads Trump among black voters 87-8, is well ahead among Hispanic voters 73-22, and has a healthy lead among Asian-American voters 66-23.

Trump leads the Democratic nominee among white voters, 50-41.

The poll said 65 percent of registered voters think race relations in the United States are getting worse. Majorities across all racial groups — white, black, Hispanic and Asian-American voters — said they agree.

Trump supporters appear to be the most concerned about race relations: 78 percent say they are getting worse. Among Clinton supporters, 54 percent think race relations in the U.S. are getting worse.

The online poll was conducted Aug. 15-21 among 17,459 adults who say they are registered to vote. The margin of error is plus or minus 1.1 percentage points.