Gov. Gavin Newsom’s sudden conversion to socialism is a naked act of political opportunism. After pretending for months to oppose the so-called “billionaire tax,” he has endorsed it at the national level. Like other Democrats with ambitions for higher office, Newsom is running scared — from the leftists in his own party. It’s no longer good enough to be anti-Trump. Congressman Dan Goldman, who was Adam Schiff’s lead counsel in the first Trump impeachment, learned that the hard way in last week’