Ann Coulter
Ann Coulter speaks onstage during Politicon 2018 at Los Angeles Convention Center on Oct. 20, 2018 in Los Angeles. Coulter recently said "the only national emergency is that our president is an idiot" during a radio appearance after Trump declared a state of emergency over funding for a U.S.-Mexico border wall. Rich Polk/Getty Images for Politicon

President Donald Trump and conservative pundit Ann Coulter appear to be engaged in a public feud. Coulter has been outspoken about Trump perceived caving to Democrats about a border wall and then later amped up the heated rhetoric Friday after he declared a national emergency to fund the proposed wall.

"I hardly know her. I haven't spoken to her in way over a year but the press loves saying Ann Coulter. Probably if I did speak to her, she would be very nice," Trump said Friday at a Rose Garden press conference.

Trump also said Coulter is "off the reservation."

Coulter countered with harsh words of her own, calling Trump an "idiot" and his national emergency for a border wall a "scam."

"It was one thing, the promise he made every single day at every single speech. Forget the fact that he's digging his own grave," Coulter said on KABC's Morning Drive radio show in Los Angeles. "The only national emergency is that our president is an idiot."

Coulter then took to Twitter to emphasize her stance on Trump's declaration, accusing him of using the national emergency to "scam" his voter base.

Trump's efforts to distance himself from Coulter, author of 2016's "In Trump We Trust: E Pluribus Awesome!," had been made in response to a question over whether Coulter's support and opinions, along with those of fellow conservative talk show hosts Sean Hannity and Rush Limbaugh, had any influence over Trump's policymaking. Trump denied that he is influenced by right-wing pundits.

Coulter said that he has abandoned his base supporters and ended his chance of winning a second term.

"I can't imagine any way to get out of this," she said. "I would like to hope that there is. I don't think there is. In which case, no, of course, he can't run for re-election."

Coulter had previously been a staunch supporter of Trump. She had described him in 2016 as her all-time favorite politician.