The bill's sponsor, Republican Sen. Scott Cyrway of Albion, said the change would get Maine's implied consent provisions in compliance with recent supreme court case law.
Those who oppose the bill said having to get a warrant to test a suspected drunk driver would take too long.
"Putting warrants on all blood samples is really a bad, bad situation because you just don't have time. And especially on nights and weekends, there's no way you're going to get a warrant from a judge," Cyrway said.
The Maine Senate is expected to vote on the bill soon.