Trump and Clinton are currently the two most unpopular likely presidential nominees in the history of the NBC/WSJ poll.
Thirty four percent of registered voters have a positive opinion of Clinton, versus 54 percent who have a negative opinion (-20) — a slight uptick from her minus-24 score last month.
Trump's rating is even worse than Clinton's: Twenty nine percent have a positive opinion of him, while 58 percent have a negative opinion (-29) — an improvement from his minus-41 score in April.
"This has never been matched, or even close to being matched," Democratic pollster Peter Hart, who conducted the survey with Republican pollster Bill McInturff, says of these negative ratings for Trump and Clinton.
By contrast, Sanders is in positive territory. Forty-three percent have a positive view of the Vermont senator, versus 36 percent who have a negative view (+7). One difference Clinton and Sanders: Clinton's rating among Democratic voters supporting Sanders is 38 percent positive, 41 percent negative (-3); Sanders' rating among Clinton supporters is 54 percent positive, 23 percent negative (+31).
President Obama's overall score in the current NBC/WSJ poll is at 49 percent positive, 41 percent negative (+8).
Asked if they would consider a third-party candidate if Clinton and Trump were the major party nominees, 47 percent of registered voters say yes—a higher percentage than those who said yes on a similar question in 2008 and 2012.
Fifty percent of voters say they would not consider a third-party candidate.
The NBC/WSJ poll was conducted May 15-19 of 1,000 registered voters, including 450 cell phone-only respondents and another 46 reached on a cell but who also have a landline. The overall margin of error is plus-minus 3.1 percentage points.