President Gavin Newsom? Watch California’s newly reelected Democratic governor closely in 2023. He has been making unmistakable moves that signal his interest. He’s taken on the conservative governors of Florida and Texas and won accolades from Democratic Party insiders for his aggressive, unapologetic stands on issues like gun violence and abortion rights. He’s suggested that President Joe Biden, who turns 80 this month, is not suited for the brutal political climate. The nonpartisan book on Newsom, though, is split. “Ballot box poison,” said Tobe Berkovitz, associate professor of advertising…