WASHINGTON (AP) -- Republicans are using their weekly radio and Internet address to criticize health care legislation coming up for a test vote in the Senate.

Idaho Sen. Mike Crapo (KRAY'-poh) says rather than overhaul the system, the hefty measure will "drive up the cost of health care insurance and medical care."

Crapo says the bill isn't true health care reform and "will result in higher premiums and higher health care costs for Americans."

Democratic leaders are optimistic the bill will make it past its first hurdle tonight. Two moderate Democrats remain uncommitted ahead of the roll call, and their votes are needed to move ahead with the legislation.

Democrats say their legislation could make historic and necessary improvements in the country's social safety net.