Trump added that "'stupid' is now going to be part of the vocabulary for Democrats" and said he believed Jindal had made a "horrible" mistake.
Jindal's comments came last month during a meeting of the Republican National Committee.
“We’ve got to stop being the stupid party. It’s time for a new Republican Party that talks like adults,” Jindal said. “We had a number of Republicans damage the brand this year with offensive and bizarre comments. I’m here to say we’ve had enough of that.”