Senate Republicans failed to pass a straight repeal of the Affordable Care Act on Wednesday, the second piece of health care legislation to die since the Senate agreed Tuesday to continue debate on getting rid of Obamacare.

Gage Skidmore - flickr.com

The repeal-only bill needed at least 50 votes to pass but received just 45, with seven Republicans opposing the plan. On Tuesday night, the Senate plan to repeal and replace Obamacare was voted down, 43-57.

At this point, Republicans best chance of passing health care reform seems to be a new "skinny" repeal plan, which would strike select parts of Obamacare, such as the individual mandate to buy insurance and health-related taxes. But that's speculation: It's unclear what exactly a skinny repeal bill would actually look like because one hasn't been written yet.

Some have argued that "skinny repeal" is a misnomer because it could actually serve as a foot in the door for House Republicans to add amendments, ultimately making the bill much more sweeping.

"The goal here wouldn't necessarily be to settle for that outcome, but to pass something that would trigger a conference committee with the House," Axios reported. "Normally designed as a way to hammer out specific differences in House and Senate bills, a conference here would function more like another opportunity to write another bill—albeit under many of the same restrictions."

Had the repeal-only bill passed, an estimated 32 million Americans would have lost their insurance over the next 10 years and premiums would have doubled, according to the Congressional Budget Office (CBO).

Here are the senators who voted in favor of repealing Obamacare.

• John Barrasso (R-Wyo.)
• Bill Cassidy (R-La.)
• James Lankford (R-Okla.)
• Jerry Moran (R-Kan.)
• Ron Johnson (R-Wis.)
• Steve Daines (R-Mont.)
• Roy Blunt (R-Mo.)
• Tom Cotton (R-Ark.)
• John Boozman (R-Ark.)
• Rand Paul (R-Ky.)
• Deb Fischer (R-Neb.)
• Dan Sullivan (R-Alaska)
• Jim Risch (R-Idaho)
• Michael Crapo (R-Idaho)
• John Hoeven (R-N.D.)
• Orrin Hatch (R-Utah)
• Bob Corker (R-Tenn.)
• John Thune (R-S.D.)
• Michael Enzi (R- Wyo.)
• Richard Burr (R-N.C. )
• James Inhofe (R-Okla.)
• Jeff Flake (R-Ariz.)
• Todd Young (R-Ind.)
• Mike Lee (R-Utah)
• Roger Wicker (R-Miss.)
• Patrick Toomey (R-Pa.)
• Thom Tillis (R-N.C.)
• Richard Shelby (R-Ala.)
• Tim Scott (R-S.C.)
• Ben Sasse (R-Neb.)
• Marco Rubio (R-Fla.)
• Michael Rounds (R-S.D.)
• Pat Roberts (R-Kan.)
• David Perdue (R-Ga.)
• Mitch McConnell (R-Ky.)
• John Kennedy (R-La.)
• Johnny Isakson (R-Ga.)
• Charles Grassley (R-Iowa)
• Lindsey Graham (R- S.C.)
• Cory Gardner (R-Colo.)
• Joni Ernst (R-Iowa)
• Ted Cruz (R-Tex.)
• John Cornyn (R-Tex.)
• Thad Cochran (R-Miss.)

Here are the senators who voted against repealing Obamacare.

• Dean Heller (R-Nev.)
• Lamar Alexander (R-Tenn.) 
• John McCain (R-Ariz.)
• Rob Portman (R-Ohio)
• Shelley Moore Capito (R-W.V.)
• Lisa Murkowski (R-Alaska)
• Susan Collins (R-Me.)
• Mazie Hirono (D-Hawaii)
• Brian Schatz Hawaii (D-Hawaii)
• Sherrod Brown (D-Ohio)
• Robert Menendez (D-N.J.)
• Sheldon Whitehouse (D-R.I.)
• Bill Nelson (D-Fla.)
• Dianne Feinstein (D-Calif.)
• Claire McCaskill (D-Mo.)
• Joe Manchin (D-W.V.)
• Kirsten Gillibrand (D-N.Y.)
• Richard Blumenthal (D-Conn.)
• Kamala Harris (D-Calif.)
• Joe Donnelly (D-Ind.)
• Gary Peters (D-Mich.)
• Mark Warner (D-Va.)
• Edward Markey (D-Mass.)
• Martin Heinrich (D-N.M.)
• Cory Booker (D-N.J.)
• Michael Bennet (D-Colo.)
• Christopher Murphy (D-Conn.)
• Tom Udall (D-N.M.)
• Bob Casey (D-Pa.)
• Chris Coons (D-Del.)
• Heidi Heitkamp (D-N.D.)
• Debbie Stabenow(D-Mich.)
• Chuck Schumer (D-N.Y.)
• Jeanne Shaheen (D-N.H.)
• Benjamin L. Cardin (D-Md.)
• Tammy Duckworth (D-Ill.)
• Ron Wyden (D-Ore.)
• Elizabeth Warren (D-Mass.)
• Chris Van Hollen (D-Md.)
• Jon Tester (D-Mont.)
• Jack Reed (D-R.I.)
• Patty Murray (D-Wash.)
• Jeff Merkley (D-Ore.)
• Patrick J. Leahy (D-Vt.)
• Amy Klobuchar (D-Minn.)
• Tim Kaine (D-Va.)
• Maggie Hassan (D-N.H.)
• Al Franken (D-Minn.)
• Richard Durbin (D-Ill.)
• Catherine Cortez Masto (D-Nev.)
• Thomas R. Carper (D-Del.)
• Maria Cantwell (D-Wash.)
• Tammy Baldwin (D-Wis.)
• Angus King (I-Me.)
• Bernie Sanders (I-Vt.)