Signature legislation passed during his presidency included broad tax cuts, the Patriot Act, the No Child Left Behind Act, the Partial-Birth Abortion Ban Act, the Medicare Modernization Act, and funding for the AIDS relief program known as PEPFAR. In the 2004 presidential race, Bush defeated Democratic Senator John Kerry in a close election. Following Republican efforts to pass the Medicare Act of 2003, Bush signed the bill, which included major changes to the Medicare program by providing beneficiaries with some assistance in paying for prescription drugs, while relying on private insurance for the delivery of benefits. The retired persons lobby group AARP worked with the Bush Administration on the program and gave their endorsement.