If only Massachusetts could lose one of its Senate seats as well.
Hmmm...I'm not sure what data he's using. I'm guessing that it's
http://www.census.gov/Press-Release/www/releases/
In particular,
Arizona’s Maricopa Leads Counties in Population Growth Since Census 2000
which, if you follow the links, takes you to population estimates for every state in the union. But the estimates go back to last July so that's really not new data.
I suppose his value added is taking that data and projecting to 2010.
As is (July 2006 official estimate), I get TX+2, AZ+1, CA+1, FL+1, GA+1, UT+1, IA-1, LA-1, MA-1, MO-1, NY-1, OH-1, PA-1, and MI at 0.
However there are still 3.5 years left to 2010, and TX could very well get up to +4, and MI would be lucky to stay at 0.
"If only Massachusetts could lose one of its Senate seats as well."
Yeah. I'm thinking of one in particular.