Critz-Rothfus on razor's edge

At 10 p.m. the most competitive congressional race in Pennsylvania -- Pa12 -- remains on a razor's edge at 50.3-49.7% for Democratic incumbent Mark Critz over GOP challenger Keith Rothfus, with the difference between them about 1,200 votes.

Too early to call, but Rothfus is doing pretty well in Somerset (which is Critz country) and where he had a 2,000-vote cushion. Yet in Beaver -- which voted for Romney over Obama by 1K votes -- Critz had a nearly 2K lead of his own.

Here's a snapshot from the state's website (which cuts off Westmoreland, where Rothfus leads by about 500 votes):