HILLARY CLINTON: Announces Presidential exploratory committee.
BILL RICHARDSON: The New Mexico governor announces he's forming a committee to get in the race.
A TALE OF TWO TAPES: Jeff Jarvis looks at announcements from Senator Hillary Clinton and anti-gay Republican Kansas Senator Sam Brownback, who also announced plans to enter the Presidential race this weekend.
SAM BROWNBACK: Dodges gay adoption question from George Stephanopolous.
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