Suozzi probably didn’t run much oppo research. He was an incumbent, with amazing name recognition, in a district that favored him, in a period of time that favored Democrats.

This time more research was done and it was being sent out in press releases since August m.

Also, it’s not the DNC that focuses on Congressional races. It’s the DCCC (they had a detailed memo on him in August). And “NY DNC” doesn’t make sense.