Poll: Clinton leads Trump by 8 points post-convention
© Greg Nash
Clinton has 50 percent support to Trump's 42 percent in the poll released early Tuesday. Clinton's support has grown while Trump's has decreased since last month's poll, which had her ahead by 1 point, 46 to 45 percent.
Clinton's favorability among Democrats and Democratic-leaning voters also rose 6 points, to 80 percent, after the Democratic convention, while her unfavorables fell 5 points, to 19 percent.
It's the latest post-convention poll finding Clinton ahead. A CNN/ORC poll released late Monday found Clinton leading Trump by 9 points, 52 to 43 percent, while a CBS poll also released Monday found her up 6 points, 47 to 41 percent.
The new NBC/SurveyMonkey poll also found Clinton retaking the lead from Trump in a four-way presidential matchup with third-party candidates. Clinton leads Trump by 4 points, 42 to 38 percent, in that scenario. Libertarian nominee Gary JohnsonGary Earl JohnsonThe Trump strategy: Dare the Democrats to win Trump challenger: 'All bets are off' if I win New Hampshire primary Scaramucci assembling team of former Cabinet members to speak out against Trump MORE is at 9 percent and Green Party candidate Jill Stein is at 4 points. 
Trump was leading Clinton by 2 points in a four-way matchup last week.  
The new survey of 12,742 adults was conducted July 25–31 online with a margin of error of 1.2 percentage points.