WASHINGTON — Donald Trump’s campaign manager refused to apologize Sunday for pulling a reporter by the arm, calling a mea culpa “unrealistic.”

Corey Lewandowski initially called former Breitbart reporter Michelle Fields “totally delusional” and insisted he “never touched” her after a March 8 Trump press conference.

A video later showed he grabbed Fields, but a Florida prosecutor last week declined to move forward with a simple battery charge, citing a lack of evidence.

“I’d be happy to have a conversation with her,” Lewandowski told “Fox News Sunday.” “But to apologize to someone I’ve never spoken to and candidly don’t ever remember having any interaction with, I think, is something that is a little unrealistic right now.”

Fields initially claimed Lewandowski grabbed her tightly by the arm and she “almost fell to the ground” as she tried to ask Trump a question as he left a Jupiter, Fla., press conference. The video shows Fields being pulled backwards but not losing balance, as she claimed.

“The sum total of my relationship with Ms. Fields was caught on that videotape. She’s an individual I had never met before, had never spoken to before. And candidly, I didn’t remember the incident. The incident lasted less than 3 seconds. … I would have remembered if I tried to violently throw someone to the ground,” Lewandowski said.

Fields said she would have not filed charges if Lewandowski said sorry from the start.

“If I had just received an apology as I was told I was going to receive, which is why I was quiet the first two days, this would have not been such a huge story,” Fields said Sunday on CNN’s “Reliable Sources.” “The reason why it’s such a huge story is because Corey lied. Donald Trump lied. They defamed me and went on this huge smear campaign against me.”

Fields is still considering a defamation lawsuit and believes her criminal case wasn’t treated fairly.

She accused the Florida district attorney, David Aronberg, and his wife of being too cozy with Trump to be impartial.

Aronberg should have recused himself because he’s “partying” at Trump’s Mar-a-Lago club in Palm Beach and his wife, Lynn, has a public relations firm whose website is plastered with photos of her posing next to Donald and Melania Trump, Fields said.

“If I were a prosecutor and my wife was trying to monetize my relationship with Donald Trump and it’s right there on her website and I’m partying all the time at Mar-A-Lago, I would recuse myself,” Fields said.

Aronberg is a Democrat who fundraises for Hillary Clinton. He said politics wouldn’t play a role. Lynn Aronberg believes the case was handled professionally.

“Donald Trump, his family and companies have never been clients of mine. I have a number of pictures with clients and non-clients on my website,” Lynn Aronberg told The Post.

Trump had stood by Lewandowski from the start and suggested Fields was the real threat because she was carrying a pen that could have been a “little bomb.”

In her first TV interview since the incident, Fields stood by her story that she almost lost her balance from the grab despite criticism that she exaggerated the incident.

“I felt someone pull me back. I’m in high heels. I’m not expecting someone to yank me. That is how I felt.”