Castle for Senate 2008?

[Adlai Stevenson]

A few years ago Castle said he enjoyed being in the House now more than he ever has - whether that is true or not, it would come back to haunt him in a Senate campaign, as would his age: 71.  Given the 2000 Senate campaign that would also be a liability.  I doubt whether Castle would be interested in running anyway but furthermore I also doubt Biden is going to retire, especially as his campaign for President imploded.