Can an ex president run again for US president?
Twenty-second Amendment to the United States Constitution
As worded, the primary focus of the 22nd Amendment is on limiting individuals twice elected to the presidency from being elected again. Due to this, several issues could be raised regarding the amendment's meaning and application, especially in relation to the 12th Amendment, ratified in 1804, which states, "But no person constitutionally ineligible to the office of President shall be eligible to that of Vice-President of the United States". While it is clear that under the 12th Amendment the original constitutional qualifications of age, citizenship, and residency apply to both the president and vice president, it is unclear whether someone who is ineligible to be elected president could be elected vice president. Because of this apparent ambiguity, there may be a loophole in the 22nd Amendment whereby a two-term former-president could be elected vice president and then succeed to the presidency as a result of the incumbent's death, resignation, or removal from office (or even succeed to the presidency from some other stated office in the presidential line of succession).
2016 United States presidential election in Wyoming
Following his second term, Barack Obama is not eligible for another reelection. In October 2015, Obama's running-mate and two-term Vice President Joe Biden decided not to enter the race for the Democratic presidential nomination either. With their term expiring on January 20, 2017, the electorate is asked to elect a new president, the 45th president and 48th vice president of the United States, respectively.