So what happened? Street won West Philly, but Rabb won Center City by even more. Meanwhile, Stanford held up pretty well, limiting Street's margin in his best wards. And progressive wards posted huge margins for Rabb.
If either Center City or West Philly votes decisively for Street, that should be enough to win him the election. But if Rabb fights to a draw or close to it in both areas, I expect him to be headed to Congress.