Why didn't local democrats in his district come out to support him with more rigor? Did he forge those relationships? Did he cooperate and take time to get to know the Westchester community? If I understand correctly, the redistricting made him lose a chunk of the Bronx. Race-wise it looks like based on wikipedia change history the district changed from 30% black and 30% white to 40% white and 20% black. I am not saying this is inherently racism, but his constituency changed. He lost a pocket of his base and was required to forge new relationships and build up a new base. And his fumbles and positions on Israel did not help in that regard. Money played into it, but he redistricting and bad choices created the vulnerability that allowed them to step in.