WATCH: Tim Walz says Trump 'doesn't know the first thing about service'

Minnesota Gov. Tim Walz on Tuesday appeared at his first campaign rally with Vice President Kamala Harris in Philadelphia hours after she selected him to join her 2024 ticket. In the rally, Walz went after their rival, Republican presidential nominee Donald Trump, saying that the former president "doesn't know the first thing about service."

"He doesn't have time for it because he's too busy serving himself," Walz said.

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