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).
2016 United States Senate election in Kentucky
Paul was running for both president and re-election, and considered several options to get around the law preventing him from appearing twice on the ballot, but he dropped his presidential bid to focus on re-election to the Senate on February 3, 2016. His supporters said the law does not apply to federal offices and suggested changing the May Kentucky presidential primaries to March caucuses would allow Paul to run for re-election and continue to seek the presidential nomination. However, this option would have only worked until the presidential primaries were over, as he would still have had to appear on the ballot twice in November if he had won the Republican presidential nomination. Other options that were open to him included running for both offices and leaving it to Democratic Secretary of State Alison Lundergan Grimes to remove him from the ballot; attempting to replace Grimes in the 2015 elections with a Republican Secretary of State who would not enforce the law; filing a lawsuit against the law; and running for president in every state except for Kentucky, where he could have run for re-election and hoped to win the presidency without Kentucky's electoral college votes.