Democrat Ben Nelson voted with republicans. Andrea Mitchell asks Claire McCaskill if Nelson is protecting Berkshire Hathaway. Mitchell says the republican concern is that amendments will be rammed through and they won't have leverage. My guess as to why republicans are blocking debate is that the republicans don't want it known that they're fighting for more relaxed reform than the democrats. The democrats know this and that's why they keep voting. The NYT says republican stalling plays well with their base. They hope to stall it until Memorial Day