Joe Biden agrees with the notion that Donald Trump is an “illegitimate president.”

Biden attended a public house party in Nashua, New Hampshire and fielded questions from voters on Tuesday. One was more of a rant-turned-demand about what Democrat candidates should say and do.

“I have a very severe case of what’s called Trump Derangement Syndrome,” the woman admitted as Biden didn’t seem surprised.

“It probably predates his announcement for election because I know people in New York City who dealt with him years ago, but I have a frustration also with the Democratic Party,” she said.

“I would like to see the party and every candidate come out with a very simple message regarding him: He won the election by 70,000 votes in Pennsylvania, Wisconsin and Michigan. He won it because he had help by the Russians,” she claimed as Biden nodded approvingly.

“He refuses to do anything to stop that, he’s failing in carrying out the most basic function to uphold the Constitution. He’s not defending our national security, he has no interest in doing it,” she accused as Biden listened intently.

“I don’t want to live in a country run by Vladimir Putin,” she continued to lecture. “I don’t think anybody in the country should want that. I don’t understand why millions of people don’t get that message.

“And I think every candidate needs to pound that message home again and again and again,” the woman told Biden as he stood silently.

“He’s an illegitimate president in my mind,” she continued, triggering applause from the Biden fans.

“I think all the talk about impeachment and what the Democrats should do, that’s fine — it’s theoretical at this point. Let them investigate, let them subpoena, let them go to the Supreme Court. He’s illegitimate,” she declared, “and my biggest fear is he’s going to do it again with the help of Vlad, his best pal, and we’re going to be stuck for six more years with this guy, and that is terrifying.”

“Would you be my vice presidential candidate?” Biden responded.

“Folks, look, I absolutely agree,” he said.

Biden said he’s not going to “get in the mud wrestling” with Trump or “stoop to his level.”

He went on to claim he’s not going to engage in “name-calling,” despite calling Trump a “clown” and “no good S.O.B.” last week.