There were 17 elected two term presidents:
Washington, Jefferson, Madison, Monroe, Jackson, Lincoln, Grant, Cleveland, McKinley, Wilson, F. Roosevelt, Eisenhower, Nixon, Reagan, Clinton, Bush43, Obama
There were four presidents who served two terms, but one term was not from election, but from serving after their deceased predecessors. After finishing out the term of other Presidents, they were then re-elected:
Teddy Roosevelt, Calvin Coolidge, Harry Truman, and LBJ
There were three presidents that were elected to a second term, but did not finish the second term:
Lincoln and McKinley were assassinated
Nixon resigned from office
