"This is a common-sense amendment that will secure disability payments for veterans and make sure we are not paying for disabilities that are not truly service-related," said Coburn. 

Sen. Patty MurrayPatty MurrayCBO to release report Tuesday on ending ObamaCare insurer payments OPINION | Progressives, now's your chance to secure healthcare for all McConnell open to bipartisan deal on health insurance payments MORE (D-Wash.) countered that injuries caused by herbicides like Agent Orange were too difficult to track among former members of the military in order to justify such stringent standards.

“Our military did a miserable job of tracking these exposures," said Murray. "No veteran is going to be able to tell you when or much of this poison, Agent Orange, they inhaled.”

The Senate voted 69 to 30 to table Coburn’s amendment. 

An amendment offered by Sen. Kelly AyotteKelly AyotteRNC chair warns: Republicans who refused to back Trump offer 'cautionary tale' OPINION: Democracy will send ISIS to the same grave as communism Kelly Ayotte joins defense contractor's board of directors MORE (R-N.H.) to ensure that “wounded warriors” get the benefits of next-generation advanced prosthetics in a timely fashion and an amendment offered by Sen. Barbara BoxerBarbara BoxerTime is now to address infrastructure needs Tom Steyer testing waters for Calif. gubernatorial bid Another day, another dollar for retirement advice rip-offs MORE (D-Calif.) to order a study on the infrastructure of Department of Defense schools were both agreed to by unanimous consent.   

Republican Sens. Tom CoburnTom CoburnAl Franken: 'I make fun of the people who deserved it' The more complex the tax code, the more the wealthy benefit Congress, stop using our nation's military policy for political purposes MORE (Okla.) and Bob CorkerRobert (Bob) Phillips CorkerOPINION: Congress should censure Trump for his unfit conduct How to fix Fannie and Freddie to give Americans affordable housing No. 2 Senate Republican backs McConnell in Trump fight MORE (Tenn.) both voted against the underlying legislation. 

The Senate is expected to now move to the House GOP's legislation to cut and cap federal spending while adding a balanced-budget amendment to the Constitution.