Donald Trump continued to mock Kamala Harris on social media on Saturday, according to reports Politico.eu
In follow-up posts on Truth Social after canceling his planned ABC debate with Harris, Trump called Harris "low IQ," "stupid," and said she didn't have the "mental capacity" to debate him.

The former president's remarks signaled a sustained escalation of anti-Harris rhetoric that many in his party have warned against.

Trump pulled out of the originally planned Sept. 10 ABC debate and instead proposed a Sept. 4 face-off with Harris on Fox News – albeit on his own terms, including a “TARGET ARENA AUDIENCE!” in Pennsylvania.

"Whenever Trump doesn't talk about inflation, immigration and the economy, he doesn't win over voters," said Barrett Marson, a Republican strategist in Arizona.

"Going after Harris' intellect won't move middle-of-the-road voters." They won't care if the ex-prosecutor is stupid or smart. They want to hear about a plan to curb inflation and lower interest rates and make the economy work for the middle class."

Harris hit back on social media on Saturday, accusing Trump of reneging on a promise to debate "anytime, any place" and suggesting she would attend the prearranged ABC debate whether Trump does or not.

Trump then issued an ultimatum, saying he would either debate Harris on Fox News or not at all — while hurling a number of insults against her intelligence and accusing her of not having the "real capacity" to face him one-on-one.

"Does anyone notice that Kamala Harris doesn't do interviews?" That's because she's really stupid! said Trump.

Harris trailed Trump in Arizona, Michigan, Nevada and Wisconsin, even by a few percentage points, according to a Bloomberg News/Morning Consult poll released Tuesday. And a Susquehanna Polling survey showed she had a 4 percentage point lead over Trump in Pennsylvania, receiving 47 percent of voters to Trump's 43 percent.

Harris' campaign accused Trump of trying to change the terms of the debate in his favor