The only upside for Hillary here is that it is ARG who’s doing the polling:

American Research Group Pennsylvania Democratic Primary

• Clinton - 45% (51)
• Obama - 45% (39)

Poll was conducted April 5-6 of 600 likely primary voters and has a 4% MoE. Numbers in parentheses are from the March 26-27 poll.

That’s right - in a week and a half, Hillary’s lead dropped from 12 points to 0 - and Obama gained as much as she lost.

I don’t expect Hillary will end up losing Pennsylvania, but I do expect a narrow victory there will finally enable her to see the writing on the wall all of us have seen for quite some time.