No Republicans, in either the Senate or the House, voted to pass Obamacare, which became law in March 2010.
The senators’ website, which also features a stopwatch counting down the days, hours, minutes, and seconds until the end of the fiscal year and a proposed continuing resolution to keep the government funded – names the 11 Republican Senators who “won’t pledge” to sign the petition.
The 13 Republican Senators who have signed the pledge are Mike Lee (Utah), Ted Cruz (Texas), Rand Paul (Ky.), Chuck Grassley (Iowa), Mike Crapo (Idaho), Jim Risch (Idaho), Pat Roberts (Kan.), David Vitter (La.), Deb Fischer (Neb.), Jeff Chiesa (N.J.), Jim Inhofe (Okla.), John Thune (S.D.) and Mike Enzi (Wyo.)
The remaining Republican Senators are listed as not having signed the pledge as opposed to those who have said they will not sign it.
The senators in support of defunding Obamacare have said they will vote for a continuing resolution that will fund government operations but not the health care law.
Source material can be found at this site.