First lady Jill Biden unveiled a commemorative stamp at the White House on Monday featuring former first lady Nancy Reagan. The stamp, which will be released July 6, is the sixth released by the U.S. Postal Service to feature a presidential spouse. Martha Washington, Abigail Adams, Dolly Madison, Eleanor Roosevelt and "Lady Bird" Johnson are the others. July 6 will mark the 101st anniversary of Reagan's birth and culmination of ...