With polling like this, it's going to be tough for Trump to survive his wild unpopularity in 2020

Three separate polls this week have now shown Donald Trump's approval ratings tanking.

• CNN: 39% approve, 55% disapprove.
• Washington Post/ABC: 38% approve, 56% disapprove.
• Gallup: 39% approve, 57% disapprove.

As CNBC's John Harwood noted, the Gallup number could be an ominous omen for Trump’s reelection. Just before the GOP’s midterm rout last year, Gallup put Trump 14 points underwater with 40% approval, 54% disapproval. Now, he's suffering an 18-point deficit.

But it's still Trump's stellar disapproval ratings that could spell his downfall. The number of people who strongly disapprove of the job Trump is doing in the CNN poll, 45%, dwarfs those who strongly approve of it, 28%. And among all 55% of CNN respondents who disapprove of Trump's job performance, 98% of them say he does not deserve to be reelected, while just 1% say he does.

In other words, people who dislike Trump are pretty fricking diehard about it. That means he stands little chance of picking up voters, even if they are uneasy about the Democratic nominee. As CNN's Ronald Brownstein notes, "Trump won't outrun his approval by much."