WASHINGTON, DC.- The National Portrait Gallery marks the centennial of the 40th President’s birth with an exhibition chronicling Ronald Reagan’s early years in Illinois, his acting and political career and presidency from 1981 to 1989. Reagan’s warm manner and cheerful smile were hallmarks of a personality that fascinated Americans, but it was his steadfastness to the ideas of a limited government and a free-market economy that won him votes. “One Life: Ronald Reagan” is open July 1 through May 28, 2012.