Zohran Mamdani’s victory-lap speech Tuesday night reeked of Vladimir Lenin after Russia’s 1917 communist revolution. But instead of commanding a Red Army, the mayor-elect should be aware he will be facing lots of red ink. That’s on top of some very strict and sensible financial rules put in place some 50 years ago — just in case a deranged Marxist ended up running New York City. Yes, socialism can sound rousing when it’s pitched by a skilled orator.... But NYC — with plenty of welfare statism already on the books — will never go full-on Soviet Union. That’s because laws...