WASHINGTON — A leading GOP negotiator on health care struck a further blow to the chances of a bipartisan compromise by saying today Democratic proposals would restrict medical choices and make the country's "finances sicker without saving you money."

The criticism from Sen. Michael Enzi, R-Wyo., echoed that of many opponents of the Democratic plans under consideration in Congress. But Enzi's judgment is especially noteworthy because he is one of only three Republicans who have been willing to consider a bipartisan bill in the Senate.

In the Republicans' weekly radio and Internet address on Saturday, Enzi said any health care legislation must lower medical costs for Americans without increasing deficits and the national debt.

"The bills introduced by congressional Democrats fail to meet these standards," he said.

Enzi, together with Republican Sens. Charles Grassley of Iowa and Olympia Snowe of Maine, has held talks with Senate Finance Committee Chairman Max Baucus, D-Mont. But the chance of a bipartisan breakthrough has diminished in the face of an effective public mobilization by opponents of Democratic proposals.

He called for more competition among health insurers, for the ability of small businesses to band together across state lines to negotiate for lower-cost insurance plans, for tax breaks to help people buy insurance and for reducing malpractice lawsuits.