Donald Trump is the most unpopular presidential candidate in more than 30 years, according to a new poll.

The only top-tier presidential candidate more unpopular than Trump, according to the poll, is former Ku Klux Klan leader David Duke.

Trump is seen unfavorably by 67 percent of the public, according to a new ABC News/Washington Post poll produced by Langer Research Associates. That level is unchanged since last month, and a few points lower than his high 71 percent ranking in the same poll roughly a year ago. Just 31 percent have a favorable view of Trump.

In February 1992, Duke was rated unfavorably by 69 percent of Americans in an ABC/Post poll. Duke won fewer than 120,000 votes and no delegates in his bid for that year's GOP presidential nomination.

Trump's rivals are in much better shape when it comes to favorability ratings.

Texas Sen. Ted Cruz is viewed unfavorably by 53 percent of Americans and favorably by 36 percent; 11 percent have no opinion. John Kasich, who is trailing both Trump and Cruz in delegate count, breaks even with 39 percent unfavorable and 39 percent favorable. Twenty-two percent have no opinion of the Ohio governor.

The telephone poll was conducted April 6-10, 2016, in English and Spanish, among a random national sample of 1,010 U.S. adults. Results have an overall margin of error of plus or minus 3.5 percentage points.