Martin Heinrich was one of 13 Democratic U.S. senators who voted against legislation earlier this week that would have allowed Americans to buy prescription drugs from other countries. The measure, a health care reform idea often supported by progressives, came as an amendment to legislation aimed at changing Senate rules to allow majority votes on budget bills. The procedural changes, which the Senate narrowly approved in the early hours of Thursday, are the first step in Republican plans to repeal as much of the Affordable Care Act, known as Obamacare, as they can. Bernie Sanders, the Vermont independent senator who unsuccessfully ran for the Democratic Party presidential nomination last year, sponsored the amendment with Sen. Amy Klobuchar, D-Minnesota. Senators rejected the amendment on a 52-48 margin, with 12 Republicans casting their votes in favor.