Incensed over President Obama’s tax compromise, House Democratic leaders are showing signs of abandoning the administration and going their own way on critical issues such as national security. In a striking move, the appropriations committee late Wednesday attached a provision to a $1.1 trillion resolution to keep the government funded next year that would prevent Obama from spending any funds to try terrorism suspects in civilian court instead of military commissions. The language would essentially prevent the closing of the detainee prison at Guantanamo Bay. Some House Democrats viewed the move as an act of defiance and a direct demonstration...