alex castellanos, is it a smart thing for republicans to be taking on, this fight over medicare?publicans have gone home to their districts and are fielding tough questions, basically saying you want to do what? you want to change medicare as we know it? here's an ad that's running, a political ad, americans united for change, that takes on congressman ryan's plan about medicare. >> paul ryan looks like a nice young man, but on april 15th, he voted to end medicare and its guaranteed health care benefits. ryan wants to use that money to give millionaires a $200,000 tax break, ending medicare so millionaires can get another tax break? really? call congressman ryan and ask what were you thinking? >> what are they thinking politically? >> one thing we've learned in washington over these years is just because one side loses doesn't mean the other side wins. i think we're in a situation where everyone loses politically in this debate. certainly, republicans are being hurt. campaign 2012 has started. we've seen the evidence. but you know, democrats also lose, too. look, this is what eve