The biggest decline for President Trump in the poll comes from seniors, who are now backing Joe Biden by a 62% to 35% margin.

New NBC/WSJ poll of 2020 registered voters Biden 53% (+2 since last month) Trump 39% (-4) ** Who did a better job in the debate? Biden 49% Trump 24% -both equally 1% -neither good 17% -not sure 9%

Big takeaway from the new NBC/WSJ poll is that the incumbent is below 40%. Biden 53% Trump 39% Trump's snarling debate fiasco likely hurt him badly. It probably won't stay here but it again shows Trump trapped at dangerously low levels for an incumbent.

Biden's lead over Trump nearly doubled nationally to 14 percentage points after first debate in NBC/WSJ poll (but before Trump's hospitalization)

Joe Biden’s national lead over President Trump nearly doubled after Tuesday’s presidential debate, with voters saying by a 2-to-1 margin that Biden has the better temperament to be president, according to a new NBC News/WSJ poll.

“The biggest declines for Trump in the poll come from seniors (who are now backing Biden by a 62 percent-to-35 percent margin) and suburban women (58 percent to 33 percent).”

“Joe Biden's lead has nearly doubled since Tuesday's debate with voters saying by a 2-to-1 margin that he has the better temperament to be president.” Biden: 53% Trump: 39%

Even before the announcement of Trump's positive test, Biden's lead nearly doubled, to 14 points, in new NBC/WSJ Poll following the debate

That's a stunning collapse. nbcnews.com/politics/meet-… pic.twitter.com/a0F997RIA9

Sometimes, reporters/pundits completely misread how a given political development will "play" with Americans. But it seems like the media reaction to Trump's debate performance (consensus: bad, unpleasant) was in line with voters

Reminder: CBS News released a poll on Oct. 10, 2016, where Hillary Clinton had opened up a 14-point lead on Donald Trump.