Try AZ, PA and MI. Those states are already close and a block shift by any identifiable block can change the state. I would also look at NV, VA and WI.
A shift in the Jewish vote in Chicago will not affect where IL electoral votes go, but a shift in the Jewish communities from Madison and Milwaukee will affect WI. The problem is nay sayers blocking outreach and "I told you so" being rather off putting to gaining converts.