Our exclusive guest this week:
• Sen. Barack Obama, D-Ill., Democratic presidential candidate

The "Obama Watch" will finally stop this weekend when Senator Barack Obama sits down with us for an exclusive "FOX News Sunday" interview.

After a double-digit loss in Pennsylvania, how will the Senator gain back momentum in the remaining contests? While he is ahead in pledged delegates, Senator Clinton is counting on the support of the superdelegates. With such a long Democratic primary season, how does Senator Obama feel this is affecting his party and does he see the contest continuing all the way to the Democratic convention? We'll ask this and much more when we sit down with Senator Obama, only on "FOX News Sunday."

Then, the presidential nomination battle turns to Indiana as the next test of who is most electable in November. Joining us to discuss will be Brit Hume, Washington managing editor of FOX News; Mara Liasson of National Public Radio; Bill Kristol of the Weekly Standard, and Juan Williams of National Public Radio.

Plus, our weekly look at the ups and downs, "On the Trail."

So check your local listings and we’ll see you on the next "FOX News Sunday."