I caught up with Barack Obama in the northwest Philadelphia suburbs, which will be key in this race when the votes are counted tonight.

Instead of a big time rally, Obama decided to meet with about 30 voters at a community college and take questions in a totally low-key-sit-down in front of reporters.

Later in the day, I rumbled my way back to Harrisburg to catch Hillary Clinton at a masonic shrine. It wasn't a huge crowd, but as usual, they were fired up for the Senator.

Both finished off the night with big rallies - Obama in Pittsburgh and Clinton in Philadelphia.

Was there anything to take away for this last day?

One thing that stuck out was that neither candidate went after the other on the stump. They left that to their aides and their campaign commercials.

I don't think Clinton even mentioned Obama's name in her three campaign appearances and didn't even use something like "my opponent" instead.

Obama meanwhile grabbed the Rhetoric Stick Shift and pulled it out of fourth gear and back into second. He jabbed Clinton, but did not go overboard in any way, shape or form.

So, as we wait for the results from Pennsylvania, what does this remind me of? I'm still wondering whether I am watching a repeat of Ohio.

Back in late February, Clinton was way ahead in Ohio, by over 20 points, just as she was in Pennsylvania. Then, the lead kept dropping and dropping. But in the last few days, the undecideds in Ohio (and Texas) broke for Hillary and she easily won the Buckeye State by 10 points.

I just wonder if we are moving in that same direction here in Pennsylvania. Maybe I'm wrong.

One interesting note about tonight is that Hillary Clinton is going to have her Primary Night celebration in Philadelphia, while Barack Obama is going to be in Evansville.

As in Evansville, Indiana.

Indiana votes on May 6th, along with North Carolina, the next round of primaries (no offense to Guam on May 3.)

That tells me that Team Obama knows they aren't going to win Pennsylvania. If they do, this race was over.

As for the Indiana event tomorrow night, it does have one really tasty morsel, as John Mellencamp is going to put on a special performance for Obama.

Yes, the same John Mellencamp whose song "Small Town" has now become a staple of Hillary Clinton events.

That should be fun!

I'll be back from Harrisburg, Pennsylvania tomorrow with a full, primary post mortem.