Trump walked to the edge of the podium, staring toward the man for several moments as law enforcement officials moved to escort him away from the area.

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"In the good 'ole days, law enforcement acted a lot quicker than this," Trump said when he finally returned to the microphone.

"In the good 'ole days, they'd rip him out of that seat so fast. But today everybody is politically correct," Trump said. "You know, it is a shame, when you think."

Trump paused his remarks a few minutes later after another disruption in the audience as he sought to rally supporters in Oklahoma City.

He harkened to a rally earlier this week, when he told the crowd after facing another protester, "I'd like to punch him in the face."

Earlier in the day on Friday, Trump brushed off the backing of former Ku Klux Klan grand wizard David Duke, who suggested it'd be against Americans' "heritage" to not vote for Trump.

"I didn't even know he endorsed me," Trump said of Duke's support while unveiling an endorsement from New Jersey Gov. Chris Christie at a press conference earlier in the day.