A veterans’ healthcare bill that passed the House unanimously on Wednesday may stall in the Senate amid fighting over an unrelated provision in the stopgap government funding bill and opposition from federal employees’ unions.

The “Jeff Miller and Richard Blumenthal Veterans Health Care and Benefits Improvement Act” was the last piece of reform legislation spearheaded by retiring Rep. Jeff Miller, chairman of the House Veterans Affairs Committee. The bill contained dozens of provisions, including increased healthcare benefits for homeless veterans and an expansion of education benefits for military widows and widowers.