New York’s establishment Democrats got eaten alive Tuesday night — and they did it to themselves. Worse, the national party has the same problem. Heck, Brooklyn’s Sen. Chuck Schumer and Rep. Hakeem Jeffries, the top two Dems in Congress, just got humiliated in their own backyard — and radical candidates across the country are declaring they’ll demand new House and Senate leaders once they win. The socialists have another big chance in Los Angeles, where Nithya Raman could well win this fall’s