Are Democrats in the US Senate about to become filibuster-proof? It certainly seems that way with Pennsylvania Sen. Arlen Spector announcing he is switching to the Democratic party and Al Fraken likely to take a seat soon. Despite an appeal by Franken's opponent, public polling shows the residents of Minnesotta want this election to be over with and want Coleman to concede defeat. I don't see that happening now, especially with this recent development. If nothing else, Coleman may hold on as long as possible to just prevent another Democrat from being seated.