In April 2007, Congress, now controlled by Democrats, passed a bill that called for a total withdrawal of all U.S. troops by April 2008, but Bush vetoed the bill. Without the votes to override the veto, Congress passed a bill that continued to fund the war but also included the Fair Minimum Wage Act of 2007, which increased the federal minimum wage. U.S. and Iraqi casualties continuously declined after May 2007, and Bush declared that the surge had been a success in September 2007. He subsequently ordered a drawdown of troops, and the number of U.S. soldiers in Iraq declined from 168,000 in September 2007 to 145,000 when Bush left office. The decline in casualties following the surge coincided with several other favorable trends, including the Anbar Awakening and Muqtada al-Sadr's decision to order his followers to cooperate with the Iraqi government. In 2008, at the insistence of Maliki, Bush signed the U.S.–Iraq Status of Forces Agreement, which promised complete withdrawal of U.S. troops by the end of 2011. The U.S. would withdraw its forces from Iraq in December 2011, though it later re-deployed soldiers to Iraq to assist government forces in the Iraqi Civil War.