WASHINGTON – Under growing pressure to resign, Rep. Anthony Weiner Thursday insisted again he won’t step down, and a new poll showed a majority of voters in his district agreed he should stay in office.

The New York Democrat made his defiant statement after Sen. Patrick Leahy, D-Vt., joined the calls for him to step down over revelations of his salacious social-media life, and Rep. Pete King, R-N.Y., said he can’t see how Weiner will be able to stay on.

Asked by The New York Post in a streetside Manhattan encounter if he planned to resign, Weiner said, “I’m not.”

As he headed to his Queens office, he added, “I betrayed a lot of people and I know it, and I’m trying to get back to work now and try to make amends to my constituents, and of course to my family.”

Weiner also claimed the backing of his pregnant wife, Huma Abedin, an aide to Secretary of State Hillary Rodham Clinton.

“She’s bearing up well and she’s back at work and she’s doing a great job,” he said.

A new Marist Poll released Thursday found 56 percent of the registered voters in his 9th Congressional District in Queens and Brooklyn don’t think he should quit.

But the poll also included troubling news for Weiner — only 30 percent said they’d definitely vote for him again.