Here is the full list of cosponsors, lots of R's in there. That said, this never made it out of fi comm:
* = Original cosponsor
Cosponsor Date Cosponsored
Sen. Burr, Richard [R-NC]* 01/07/2015
Sen. Warner, Mark R. [D-VA]* 01/07/2015
Sen. Rubio, Marco [R-FL]* 01/07/2015
Sen. Collins, Susan M. [R-ME]* 01/07/2015
Sen. Alexander, Lamar [R-TN]* 01/07/2015
Sen. Ayotte, Kelly [R-NH] 01/26/2015
Sen. Capito, Shelley Moore [R-WV] 01/26/2015
Sen. Shaheen, Jeanne [D-NH] 02/09/2015
Sen. Carper, Thomas R. [D-DE] 02/23/2015
Sen. Wicker, Roger F. [R-MS] 05/06/2015
Sen. Manchin, Joe, III [D-WV] 05/20/2015
Sen. Portman, Rob [R-OH] 12/01/2015