Photo: MGNWASHINGTON (AP) — President Joe Biden is casting doubt on his fitness to serve another four years in a new interview days before he leaves office after one term. And he maintains that he could have won reelection. The outgoing 82-year-old Democratic president told USA Today in the interview published Wednesday that he didn’t know if he would have had the vigor to serve another term, saying, “Who knows what I’m going to be when I’m 86 years old?” Concerns about Biden’s fitness abounded ever since he announced his reelection bid. But he dropped out of the race under pressure last July and endorsed Vice President Kamala Harris. She lost to Republican Donald Trump.