Eliza Collins

USA TODAY

Hillary Clinton has an 8-point lead over Donald Trump following last week's Democratic National Convention, according to a new NBC News/SurveyMonkey poll.

The former secretary of State was at 50%, while Trump was at 42%, in the weekly tracking poll conducted online from July 25 to 31 of 12,742 registered voters.

Clinton led by just one point in the same poll a week earlier.

When Libertarian Gary Johnson and Green Party candidate Jill Stein are included, Clinton's lead was smaller. The Democratic presidential nominee was at 42%, while Trump was at 38%, Johnson had 9% and Stein was at 4%.

Clinton also got a bump in favorability with Democrats and Democratic-leaning voters following the convention, as her rating improved from 74% two weeks ago to 80%.

President Obama also enjoyed a small post-convention bump — his approval rating improved from 49% to 52%.

The NBC News/SurveyMonkey poll follows the release of two surveys Monday — from CBS News and CNN/ORC — that also showed Clinton opening up a lead over Trump following the Democratic convention.

Polls: Clinton pulls ahead of Trump after convention