wisconsin and washington. well, mark murray is deputy political director. it's a busy sunday. good moning. >> good morning. >> first up, let's look at delaware. republican congressman mike castle is facing the challenge by the tea party favorite chstine o'donnell. if o'donnell wins the primary, does that help democrats in the general election? >> it does probably help. kristin o'donnell ha been endorsed by sarah palin and al south carolina senator ji demint. mike castle is the overwhelmin favorite not only to win the primary but also to win in the general election. remember, this is joese biden's old senate seat. and republicans are looking for a pickup. if o'donnell is able to pull off e upset, we saw joe miller pull off the upset in alaska against lisa murkowski, democrats think tir candidate chris koontz would have a better chance to win the contest. just like the map you just saw, this entire cycle we're playing on democratic turf and delaware