In September, Ms. Haskell came out as a public Trump supporter when she was interviewed for a Politico Magazine article headlined “The Real Trumpettes of Bel Air,” in which she said of Mrs. Clinton’s aide Huma Abedin, “I don’t think we should have a Muslim in power, someone working for the president.” After it appeared, Ms. Haskell noticed a change in her social position on both coasts.

“That’s when it all started,” she said. “It was a disaster.”

On election night, she went to a dinner in New York hosted by an entertainment mogul and was the only person there who admitted to voting for Mr. Trump, she said. Around 3 a.m., Ms. Haskell logged on to Facebook and posted: “How great, America wins. We love President Donald J. Trump.”

“You must be senile,” one of her followers replied.

“U ought to be ashamed,” another wrote.

On Nov. 10, she made a selfie video in the back of a New York City taxi and posted it on Facebook. “It’s up to us to do our part to make America great,” she said. “Whether you like Donald Trump or not, now is the time to become a better America.” Before signing off with her customary goodbye (“toodle-oo!”), she reminded everyone to watch her old public access shows — now available on Amazon Prime — a few of which showed her interviewing Mr. Trump when he was a mogul on the rise.

Friends distanced themselves from Ms. Haskell, she said, and one bestie dropped her after 25 years of friendship. “I was actually in tears when someone told me they didn’t want to be my friend anymore because I supported Donald Trump,” she said.

But Ms. Haskell refused to stop cheerleading. She made another video of herself while riding in a car down Park Avenue during the time of the frequent demonstrations near Trump Tower and the Trump International Hotel and Tower on Columbus Circle.

After expressing frustration with the marches and protests (“stupid,” she called them), she said into her iPhone: “Donald Trump is not going away, and people are going to have to smack their kids around and sit them down and tell them to stop acting like jerks. And to be Americans and get with the program. See you later. Toodle-oo!”