Story highlights "We are trying to elect a president," Clinton said during a long riff on Trump, "not a dictator"

Clinton's comments also came a day after Trump said Clinton should be jailed for her use of private email

San Bernardino, California (CNN) Hillary Clinton upped the ante Friday night in what has become a sustained back-and-forth with Donald Trump, suggesting that the presumptive Republican nominee wants to be a dictator.

"We are trying to elect a president," Clinton said during a long riff on Trump, "not a dictator."

Clinton made the comment at an event here after she blasted Trump for suggesting this week that Gonzalo Curiel, a federal district judge in the Southern District of California who is presiding over a lawsuit involving Trump University, has a "conflict of interest" with the businessman because of Curiel's Mexican heritage.

Clinton said Trump is attacking the judge so people don't "look down here at all the scum that came out of Trump University," a for-profit school Trump put his name on that is now being accused of framing consumers.

"Just about every immigrant that you can imagine came here for a reason, including Donald Trump's ancestors," Clinton said. "At some point you have to ask yourself, is this just nothing but a political stunt?"

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