Obama Preps For CLosing Arguments

(CBS)

From CBS News' Maria Gavrilovic:

CHICAGO -- Barack Obama makes his final push through Indiana this weekend, a state he predicts will be the tie-breaker in the Democratic primary. Obama will deliver his "closing argument" speech today, which is expected to focus primarily on the economy. During the last few days of campaigning, he has criticized both Hillary Clinton and John McCain for their gas tax holiday proposal, which he calls a "gimmick."

Michelle Obama and their daughters, Sasha and Malia, will join the senator on the campaign trail today for the first time since Iowa. Obama has spent a significant amount of time in both Indiana and North Carolina reacquainting voters with his background. At a press conference in Indianapolis yesterday, Obama conceded that despite his high profile campaign, some voters may still have questions about him.

"When you are running for president you make certain assumptions that people after fifteen months know who you are. Then you realize that maybe there are a whole bunch of folks who don't know who you are despite the fact that you're on TV everyday," Obama said. "I think it's really important for me to make sure that we are out there as much as possible and people get a chance to talk to me."

Obama will be in Indianapolis this morning when the results of today's Guam caucus will be announced. The island has four delegates up for grabs today. The Obama campaign opened an office in Guam in April, despite the territory being on the other side of the International Date Line and over 20 hours away from Washington by plane.