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Party rules

By Lester Holt, NBC News Anchor

I can't say I ever imagined a meeting of the Democratic rules committee would be "must-see television." However, anyone who has become caught up in the drama of this year's nomination battle would have a hard time looking away. MSNBC has been airing today's session all day as members debate whether to award delegates from the Florida and Michigan primaries. It reminds us that unlike the general election, the primaries are largely governed by the parties themselves, not election officials. The outcome of today's meeting, which we hope to know by the time we hit air tonight, could change the math in the Obama-Clinton race.

Since Hillary Clinton was the big winner in both states, she stands as the one with the most to win or lose from today's decision. As I watched the coverage, it struck me that if there is one good thing about this prolonged race, it is that it has taught us all a lot of things about the nomination process we never knew or didn't quite understand (okay, maybe some of it is way too inside). But think about it: Before 2008 had you ever uttered the words "super delegates" in casual conversation?

We'll be turning to Andrea Mitchell, Ron Allen and Chuck Todd for our Nightly News political coverage tonight.

There were a couple more crane accidents today, one in Wyoming and the other in Nevada raising more questions about the safety of the machines. Pat Dawson has more on yesterday's crane disaster in New York and whether a dangerous pattern is emerging.

We're also watching the scheduled space shuttle lift-off this afternoon, a potential new weapon in preventing recurrences of breast cancer, and why a new gold rush may be getting underway out west.

Thanks for checking in. We'll look for you tonight on NBC Nightly News.