And what about Russ Feingold as a candidate for the Wisconsin Supreme Court as suggested by the Progressive's Matt Rothschild?
He'd be a very serious candidate. I don't have much sense of him as a lawyer. My recollection is that he was a few years ahead of me at Harvard Law School where I think he was an average student. We worked briefly at the same law firm but he was in Madison and pretty clearly more interested in politics than practicing law. My guess is that he would be a very attractive candidate for those on the legal left.
As a result, he'd attract powerful independent opposition. Because he's never been a judge - or, for that matter, much of a lawyer - there'd be little in the way of a record concerning actual cases as will be the case with Justice Prosser and his current opponent. But Feingold has been fairly adamant in adopting a view of the Bill of Rights that emphasizes the rights of criminal defendants and that is always a tough sell in a judicial election. I think he'd lose in a hugely expensive race and that would probably make a race for the Senate in 2012 highly unlikely.
More than that, it may be a mistake to come back to a statewide race so quickly. The voters just said no. It may be best to wait a while before you ask them again.