Do you have to be a "political blogger" to be a blogger with political influence?

I shouldn't admit this, but the one single blog I check every day no matter what is PerezHilton.com. And I've noticed that in between Lauren Conrad dissings and celeb baby bump spottings, Perez gets pretty political. First was the Hillary Clinton endorsement on February 5. Discussions of everything from John Edwards' role to gas prices have ensued. Perez doesn't take much credit for his political involvement, but with over 9 million readers a day, I can't imagine he doesn't wield influence.