Now, as the Senate's debate over its version of reform legislation kicks into gear, two Republicans -- Sens. Tom Coburn and David Vitter -- have picked up that theme and are running with it. The two authored an amendment they want attached to the bill; it would require members of Congress to enroll in whatever version of the public option the final legislation creates, if it includes one.

Both Coburn and Vitter are vehement opponents of the public option, and they're hoping to prove themselves right by showing that no senator who's in his or her right mind would want their healthcare covered by it. They've gotten a surprise, though: Genuine support for their amendment from someone on the other side of the aisle -- and a proponent of the public option, at that -- Sen. Sherrod Brown, D-Ohio.

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Senators Franken, Dodd, and Mikulski also joined Sen. Brown in co-sponsoring the amendment. Here's Sen. Franken weighing in on the Senate floor.