Hillary Clinton Bolstered by Latest National Poll, Leads Donald Trump by 6 Points

Today's numbers indicate Clinton's largest margin since a poll from Aug. 31.

In a head-to-head matchup, Clinton's lead expands to 7 points over Trump, 48 to 41. The margin of error of the poll is 3.2 percentage points.

Surveys by Fox News and CBS/New York Times last week showed a spread between the two candidates within the polls' margin of error.

Clinton received more support than usual from registered male voters in the NBC/Wall Street Journal poll. Trump maintained higher levels of backing from the demographic, garnering 46 percent support to Clinton's 44 percent, but the difference is much narrower than in earlier polls.

In additional questions, respondents expressed concern about Trump's words and actions on the campaign trail, with 69 percent of those surveyed reporting that they have reservations about aspects of his campaign, with 54 percent saying they have "major" concerns.

On the Democratic side, Clinton's use of a private email server while secretary of state continued to bother voters; 64 percent expressed concern about the issue.

ABC's Ryan Struyk contributed to this report.