But Democrats pointed out that while the task force is mentioned in their bill, it is only to make recommendations to the secretary of Health and Human Services, who would be the final arbiter of what screening services would be offered to people with insurance. They said 31 million more people would have insurance -- and access to screening -- under their bill.
"The panels are free to make whatever recommendations they like. But it is up to the Congress to set public policy," said Sen. Arlen Specter, D-Pa., himself a cancer survivor.
ABC News' Vic Ratner contributed to this report.