Donald Trump’s unfavorable rating soared to 70 percent a week after his contentious comments about a federal judge’s Mexican heritage, according to a poll released Wednesday.

Only 29 percent of those surveyed in an ABC/Washington Post poll offered a positive view of the presumptive GOP presidential nominee. Last month, the same poll showed Trump’s unfavorability at 60 percent.

But Trump’s poor numbers didn’t give Hillary Clinton much of a boost. Fifty-five percent of those questioned said they had an unfavorable view of her, compared with 43 percent who gave her a thumbs-up.

That’s worse than last month, when the split was 53 percent unfavorable and 44 percent favorable.

Experts said the numbers were hardly surprising.

“Hillary has been around for a long time. She’s had a lot of time to make friends and to make enemies. Donald Trump is new to the scene, but he’s said things time and again that offended different groups of people,” New York-based political consultant Bill Cunningham told The Post.

And the negative numbers are likely to continue rising.

“This will be the most negative, vitriolic, mud-throwing campaign ever,” Cunningham said. “He has to raise her negatives. Her job will be to keep his [unfavorable] numbers high. And that means this campaign will be negative, negative, negative.”

Analyst Jerry Skurnik, a former Ed Koch aide, said that’s the state of US politics in 2016. “Democrats . . . hate Trump; and Republicans hate Hillary. It’s no secret that they are very polarizing figures,” he said.

The two, in fact, are the most unpopular presumptive major-party nominees for president in ABC/Washington Post polling dating back to 1984.

Trump was only 1 point shy of his highest unfavorability rating of 71 percent, while Clinton’s 55 percent marked a new high for her since she entered the national limelight in 1992.

The crucial voting bloc of independents aren’t enamored with either candidate either — with 68 percent not liking Trump and 63 percent down on Clinton.