Twenty-second Amendment to the United States Constitution
Some argue that the 22nd Amendment and 12th Amendment bar any two-term president from later serving as vice president as well as from succeeding to the presidency from any point in the presidential line of succession. Others contend that the original intent of the 12th Amendment concerns qualification for "service" (age, residence, and citizenship), while the 22nd Amendment, concerns qualifications for "election", and thus (strictly applying the text) a former two-term president is still eligible to "serve" as vice president (neither amendment restricts the number of times an individual can be elected to the vice presidency), and then succeed to the presidency to serve out the balance of the term (though prohibited from running for election to an additional term).
African-American candidates for President of the United States
Major party African American candidates for President of the United States could not run in primaries until nearly the third quarter of the 20th century, after the passage of the Civil Rights Act (1964) and Voting Rights Act (1965) opened up political participation to blacks in the South. In addition, party changes to give more weight to candidates' performance in primaries, rather than to party leaders' negotiation in secret, opened up the fields. In 2008, Senator Barack Obama was elected the 44th president of the United States, the first African American to win the office.