WASHINGTON — The chairwoman of the U.S. Senate Appropriations Committee said Tuesday the Government Accountability Office should sue the Trump administration over its efforts to freeze or unilaterally cancel spending approved by Congress. “I believe that GAO, which is empowered under the Impoundment and Budget Control Act of 1974 to sue in cases, should do so,” Sen. Susan Collins said. “I disagree with the Supreme Court’s temporary decision, but it was not a decision that delved into the merits of the case,” Collins said. Funds frozen for libraries, medical research, FEMARepublicans in Congress have been either supportive or relatively quiet about the Trump administration’s efforts to freeze or cancel funding approved by Congress. Senate Appropriations Committee ranking member Patty Murray, D-Wash., released a statement earlier this week rebuking the Trump administration’s actions after the GAO released its seventh impoundment decision.