More from DK:

Hoo boy it’s tight: 95% reporting and Lamb is ahead 49.9 to 49.5.
…
In terms of raw votes, it’s Lamb 101,907, Saccone 100,979. The small bit of good news for Lamb is that his raw vote lead actually grew slightly with the last update.
…
Remaining precincts: 12 in Allegheny, 5 in Westmoreland, 13 in Washington.