"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 MurrayPatricia (Patty) Lynn MurrayChildren’s health-care bill faces new obstacles Overnight Health Care: Schumer calls for tying ObamaCare fix to children's health insurance | Puerto Rico's water woes worsen | Dems plead for nursing home residents' right to sue Schumer calls for attaching ObamaCare fix to children's health insurance 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 Ann AyotteDems plan to make gun control an issue in Nevada Stale, misguided, divisive: minimum wage can't win elections Trump voter fraud commission sets first meeting outside DC 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 BoxerTrump riles Dems with pick for powerful EPA job Pelosi's chief of staff stepping down Time is now to address infrastructure needs 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 Coburn-trillion debt puts US fiscal house on very shaky ground Al Franken: 'I make fun of the people who deserved it' The more complex the tax code, the more the wealthy benefit MORE (Okla.) and Bob CorkerRobert (Bob) Phillips CorkerDeficit hawks voice worry over direction of tax plan The Hill Interview: Budget Chair Black sticks around for now Overnight Finance: White House requests B for disaster relief | Ex-Equifax chief grilled over stock sales | House panel approves B for border wall | Tax plan puts swing-state Republicans in tough spot 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.