President Biden joined striking autoworkers in Detroit on Tuesday, marking what appeared to be the first time a sitting president has ever visited a picket line. Why it matters: The pro-union Democrat stood for thousands of autoworkers leading an unprecedented strike of the Detroit Three automakers. Driving the news: Biden spoke before picketing workers, flanked by UAW President Shawn Fain. • "This is a historic moment," Fain said. After landing in Detroit, the president was asked about the UAW's endorsement in the 2024 presidential election, according to a White House pool report. • He said he wasn't worried. (full story)