Republican President Donald Trump said on Sunday he was not joking about seeking a third presidential term, which is barred by the U.S. Constitution, but that it was too early to think about doing so.

The 22nd Amendment, added to the Constitution in 1951 after President Franklin D. Roosevelt was elected four times in a row, says “no person shall be elected to the office of the President

Supporters of Donald Trump have proposed changing the Constitution to allow him to seek a third term in the White House -- during an interview on Sunday, Trump did not rule out the possibility.