The public debate for Democrats has centered around whether the party is drifting to the left. But on the heels of Rep. Joseph Crowley’s (D-N.Y.) upset primary loss to 28-year-old Alexandria Ocasio-Cortez, the real battle is looking more like a fight between establishment and anti-establishment forces. “I think it’s less about left-right and more about new-old,” said Rep. Ro Khanna (D-Calif.), who defeated a Democratic incumbent to win his seat in Congress in 2016. Khanna was a player in the Crowley battle with Ocasio-Cortez. He backed Ocasio-Cortez, though in a move that’s won him some criticism, he also endorsed Crowley....