Apparently, Arlen Specter used to be a Republican or something

Even the National Republican Senatorial Committee realizes that the best way to “go negative” on Specter is to link him to George W. Bush:

The message encourages listeners to go to this website which has lots of documentation of how Republican Specter has been over the years. It’s kind of hilarious, when you think about it, but if the Republican Party is running a campaign against Specter’s Republican history, where does that leave them, exactly?

Also hilarious: Despite targeting this ad at Democratic voters, the GOP can’t help but resort to its favorite little insult — calling Specter a “Democrat Senator” instead of a “Democratic Senator.” So the GOP strategy is to insult the voters they’re appealing to AND to mock GOP stances.

Awesome.