Scientific research on US Presidents indicates that only fathers of daughters are elected.
Obama - 2 daughters
Romney - 0 daughters
Bush - 2 daughers
Clinton - 1 daughter
Bush - 1 daughter
Reagan - 2 daughters
Carter - 1 daughter
Ford - 1 daughter
Nixon - 2 daughters
Johnson - 2 daughters
Kennedy - 1 daughter
Eisenhower 0 daughters EXCEPTION TO RULE
Truman - 1 daughter
Roosevelt - 1 daughter
Hoover - 0 daughters
This is irrefutable evidence;)
Gingrich has 2 daughters! President Ginrich!