Yes. There are no rules in the U.S. Senate any more.

[thewayne]

"The Democratic majority changed the rules of the Senate in a way that creates a Senate without rules."
-Sen. Lamar Alexander

I wish they'd changed the rules to a Texas filibuster: as long as you keep talking, and on point go for it! I really like Rand Paul's filibuster, but then Ted Cruz had to have his ramble.