Colonel Muammer Qaddaffi seems to think he can get a better deal from the Clinton White House than he did from Presidents Reagan or Bush. In a speech in late November, Major Abdulsalaam Jalloud, the regime's No.2, said Libya will be more "in harmony" with the U.S. government. In recent days, Qaddaffi dumped his Foreign Minister, Ibrahim Muhammed al-Bishari, who was accused of being unable to end U.N. economic sanctions. They were imposed last APRIl when Qaddaffi refused to hand over two Libyans accused of involvement in the 1988 Pan Am Lockerbie bombing. Qaddaffi also hopes to stop the U.N. Security Council from toughening the sanctions, which now include a commercial air embargo, at yearend.