President Obama will announce that he is nominating Federal Appeals Court Judge Sonia Sotomayor to replace retiring Justice David Souter on the Supreme Court, CNN is reporting.

The announcement is set fo 10:15 A.M., according to CNN.

Stay tuned...

UPDATE 1: Sotomayor, 54, has long been speculated to be on Obama's list. Politically, she satisfies two criteria for Obama: She is a woman and she will be the first Hispanic on the Supreme Court.

Undoubtedly, the White House will emphasize Sotomayor's upbringing as an example of the type of real world experience that Obama was looking for. Sotomayor grew up in the Bronx where she was raised in a housing project.

Sotomayor went on to attend Princeton University and Yale Law School. She then worked as a assistant district attorney under legendary New York County District Attorney Robert Morgenthau.

Sotomayor was first appointed to the federal court by President George H.W. Bush and, in 1992, she was elevated to the 2nd U.S. Circuit Court of Appeals by President Bill Clinton.

Since Sotomayor was considered certain to be on Obama's list, conservative groups have already targeted her. The Judicial Confirmation Network, a conservative group, produced a web video touting Sotomayor as a "liberal judicial activist" on its website ""

In particular, conservatives are attacking Sotomayor for a discrimination case involving firefighters in New Haven. In that case, Sotomayor, along with the court, supported the city's decision to throw out a promotion test because it would have made more white firefighters eligible for the promotion than minority candidates. Conservatives have said the ruling amounts to discrimination against the white applicants.

That case was appealed and taken by the Supreme Court this year. Sotomayor's ruling is likely to be overturned.

More to come throughout the day. For more on Sotomayor's rulings, definitely check out Tom Goldstein's four part series on her civil rights rulings at SCOTUSblog. (Part 1, Part 2, Part 3, Part 4 and this on her opinions and dissents.)