President Trump on Sunday memorialized conservative activist Charlie Kirk, praising his openness to debate and the movement he helped build.

Despite the somber tone of the event at State Farm Stadium in Glendale, Ariz., Trump’s speech frequently resembled a typical campaign rally or political address. Trump took frequent swipes at his political opponents, even as he acknowledged Kirk took a different approach.

“He did not hate his opponents, he wanted the best for them,” Trump said. “That’s where I disagreed with Charlie. I hate my opponents, and I don’t want the best for them. I’m sorry.”

Trump noted at one point that Kirk referred to his political rivals as “the left,” adding that he preferred the term “radical left” or “radical-left lunatics.”

After noting Kirk helped unite Trump’s campaign with Robert F. Kennedy Jr. and the “Make America Healthy Again” movement, Trump spoke about plans for an announcement on Monday about autism.

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He claimed Democrats “cheated like dogs” in the 2020 election, a claim Kirk echoed after that campaign.

The president attacked Illinois Gov. JB Pritzker (D), vowing that a forthcoming federal crackdown on crime in Chicago would be in Kirk’s honor. Kirk grew up in suburban Chicago.