Newton Leroy `` Newt '' Gingrich ( born June 17 , 1943 ) is a politician in the United States . Newton Leroy `` Newt '' Gingrich ( ; born Newton Leroy McPherson ; June 17 , 1943 ) is an American politician who served as the 58th Speaker of the United States House of Representatives from 1995 to 1999 .