Bush fired back.
"This is the standard operating procedure, to disparage me. That’s fine, I don’t really care…" Bush began in response to Trump.
Trump then jumped in to dig Bush about his campaign's spending, telling the him, "Spend a little more money on the commercials."
Bush then continued, and called Trump's disparaging comments "weak."
"If you want to talk about weakness, you want to talk about weakness, it’s weak to disparage women. It’s weak to disparage Hispanics. It’s weak to denigrate the disabled. And it’s really weak to call John McCain a loser because he was a POW. That’s outrageous. He’s an American hero," Bush said, referencing Trump's comment that Sen. John McCain (R-AZ) was only a "war hero because he was captured."
As Bush spoke, Trump said he does not disparage women and never called McCain a "loser." He then mentioned that he's been criticized for his profane language.
"Two days ago, he said he would take his pants off and moon everybody, and that’s fine, nobody reports that," Trump said, referencing a recent Bush interview with the Boston Globe in which the former governor lamented that he could "moon the whole crowd" and the press "would never notice."
"And then he tells me, oh my language was a little bit rough," Trump continued. "Give me a break."
Watch the exchange: