That’s what Sam Brownback’s hinting at, according to the NYTimes:
And at least one opponent of the measure, Senator Sam Brownback, Republican of Kansas, has indicated that if Dr. Frist puts the bill on the agenda, he may try to block it by filibuster.
“I have conveyed to Senate leadership that we must do everything we can procedurally to stop unethical embryonic stem cell research in the Senate, and I will work to do just that,” Mr. Brownback said in a statement released Tuesday night.