Sen. Alex Padilla snapped back at JD Vance Saturday, calling him “petty and unserious” after Vance referred to the senator as “Jose” during a press conference in Los Angeles the previous evening.

The squabble between Padilla and Vance is the latest clash between Trump administration officials and California Democrats as hostilities brew over Donald Trump’s crackdown on immigration in the city, which has seen numerous ICE sweeps and significant counterprotests in recent weeks.

“He knows my name,” Padilla told MSNBC Saturday morning. “Look, sadly it’s just an indicator of how petty and unserious this administration is. He’s the vice president of the United States. You’d think he’d take the situation in Los Angeles more seriously.”