Calif. Lt. Gov Newsom: There's still a lot of work to be done for marriage equality

FROM CNN WIRES:

Washington (CNN) - It's not often that people camp out for days waiting on a courtroom seat. Then again, it's not often that a court case offers the blend of emotional drama, legal significance and widespread social impact promised by Tuesday's U.S. Supreme Court arguments on same-sex marriage.

At stake: nothing less than how America defines marriage.

People who have camped outside the Supreme Court building in frigid temperatures and snow - some since Thursday - will file inside Tuesday morning to watch attorneys argue for and against California's Proposition 8.

The voter-approved ballot initiative banned same-sex marriage in California.Activists on both sides of the issue will stay outside to stage competing rallies.

On Wednesday, justices will hear arguments in a separate case involving the federal Defense of Marriage Act, which, like the California law, defines marriage as between a man and a woman.

This morning on "Starting Point," California Lt. Gov. Gavin Newsom weighs in on the arguments before the Supreme Court, and explains why he still thinks there is a lot of work to be done for marriage equality.

READ MORE: Same-sex marriage: A potential Supreme Court blockbuster