The Washington establishment is once again working overtime to undermine the best of President Trump’s restraint-oriented foreign policy instincts. The National Defense Authorization Act (NDAA), which Congress is currently debating, includes three separate provisions that reduce the president’s ability to reposition or withdraw U.S. troops from Syria, Europe, and South Korea. The hypocrisy is blatant. Congress is content to avoid tough votes by abdicating its warmaking powers to the executive branch. It has not formally declared war since the Second World War. Yet when the President displays a willingness to end wars and consolidate America’s overstretched military, Congress seeks to...