I think I read someplace that he's got 4 years left on this Senate seat. If so, it's far enough away that he could ride out any early attacks.
I'd say there should be H&I fire for about 3 years while research is being done.
Then open up with the big guns.
He needs to be impeached now.
Enough evidence is already on hand.
Timeline of Hanoi Kerry
http://www.archive-news.net/Kerry/JK_timeline.html