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).
Mark McKinnon
McKinnon has worked for many causes, companies and candidates, including former President George W. Bush, Senator John McCain, Late Texas Governor Ann Richards, Congressman Charlie Wilson, and musician and philanthropist Bono. He has served on the boards of numerous organizations dedicated to reforming the influence of money in politics. McKinnon was on the advisory board of Americans Elect, a defunct political organization known primarily for its efforts to stage a national online primary for the 2012 United States presidential election. In 2014, McKinnon launched Mayday PAC to force ethics reform in the United States Congress, along with Harvard Professor Larry Lessig -- who would later run for President on a related push for ethics and campaign finance reform -- and tech moguls Steve Wozniak, Fred Wilson, Peter Thiel, and Reid Hoffman. McKinnon and Julian Castro served as co-chairs of Southerners for the Freedom to Marry, before "Obergefell v. Hodges" affirmed that the fundamental right to marry is guaranteed to same-sex couples. He currently serves on the boards of Take Back Our Republic and the Austin Film Society, as well as the Advisory Council of Represent.Us, a nonpartisan anti-corruption organization.