Following his proposal to temporarily bar Muslims from entering the country, Donald Trump has increased his lead in the Republican primary to its largest margin yet, according to a new Washington Post-ABC News poll.

The results are the latest sign that Trump’s outspoken comments on immigration and terrorism continue to find an audience among rank-and-file Republicans in spite of sharp condemnation from Democrats, GOP leaders, some of Trump’s rivals and a chorus of world leaders.

The survey puts Trump’s support at 38 percent among registered Republicans and GOP-leaning independents, six points higher than in October and November. Sen. Ted Cruz of Texas, who also is running an anti-establishment campaign, has surged into second place with 15 percent, effectively doubling his support since last month.

Sen. Marco Rubio of Florida and Ben Carson are tied for third, with 12 percent each. Carson, who with Trump was at the top of the field earlier this fall, saw his support cut roughly in half over the past month. No other candidate in the new poll registers in double digits. Former Florida governor Jeb Bush stands at 5 percent among registered Republicans.

At this point in the campaign, even with the first votes fewer than 50 days away, national polls are not always the reliable predictors of where presidential nominating contests are heading. At this time four years ago, former congressman Newt Gingrich was tied with eventual nominee Mitt Romney on the Republican side. Eight years ago, former New York City mayor Rudy Giuliani led the GOP field, while Hillary Clinton held a wide lead over then-Sen. Barack Obama among Democrats. Giuliani and Clinton eventually lost.

National surveys can change quickly and sometimes dramatically after voters in the early states begin to register their preferences.

In Iowa, which kicks off the nominating season with caucuses on Feb. 1, Trump trailed Cruz in a Des Moines Register-Bloomberg Politics poll released over the weekend. Trump continues to lead in New Hampshire, which holds the first primary on Feb. 9, but that race has shown fluidity in recent weeks amid jockeying by a group of Republican candidates battling for establishment support.

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The Post-ABC survey isn’t all good news for Trump. In a hypothetical ­general-election race, Trump trails Clinton, the Democratic front-runner, by 53 percent to 40 percent among all adults and 50 percent to 44 percent among registered voters. The latter margin is within the range of sampling error.

Beyond that, 69 percent of adults nationally say they would feel anxious with Trump as president, with 49 percent saying the would feel “strongly” so. That compares with just 29 percent of Americans who say they would feel comfortable. In contrast, 51 percent say they would feel anxious with Clinton in the Oval Office, compared with 47 percent who say they would feel comfortable.

Regardless of how attitudes may change in the coming weeks, the survey underscores the degree to which Trump has dominated the GOP race in virtually all respects this year. He has skillfully used a megaphone through the media to spread his views on immigration and terrorism. He has tapped a vein of anger on the right, and he has been a relentless critic of any opponent who appears ready to challenge him.