Since Israel's founding in 1948, successive U.S. Presidents and many Members of Congress have demonstrated a commitment to Israel's security and to maintaining close U.S.-Israel defense, diplomatic, and economic cooperation. U.S. and Israeli leaders have developed close relations based on common perceptions of shared democratic values and religious affinities. U.S. policy makers often seek to determine how events and U.S. policy choices in the Middle East may affect Israel's security, and Congress provides active oversight of executive branch dealings with Israel and other actors in the region.