Pennsylvania update

If you're a Pennsylvania resident, today is the last day to register to vote or to change your party affiliation ahead of the April 22 primary.

But then again, you've probably already heard that. As a voter in the last remaining super-primary, you're, like, SO popular with the candidates, dude.

The latest RealClearPolitics poll numbers show Hillary Clinton above the 50 percent mark with a 16.6 percentage point lead in the Keystone State, so Barack Obama's supporters there have made registering new voters a priority ahead of what is widely expected to be a disappointing night for them. According to this story from the International Herald Tribune, Obama supporters are targeting, especially, Republican and independent voters to help shore up his popular vote tally -- the number that Clinton hopes to be able to pound into the heads of superdelegates at the convention in August. (Check out the last paragraph of the IHT story, in particular, for an example of how politics is an art as well as a science.)

This will be key to the electability argument that you're going to be hearing so much about over the next eight weeks. I'll tell you more about why in my column this week.