Twenty-second Amendment to the United States Constitution
The amendment prohibits any individual who has been elected president twice from being elected again. Under the amendment, an individual who fills an unexpired presidential term lasting greater than two years is also prohibited from winning election as president more than once. Scholars debate whether the amendment prohibits affected individuals from succeeding to the presidency under any circumstances or whether it only applies to presidential elections.
Rob Portman
In March 2014, Larry Sabato of the University of Virginia Center for Politics speculated that Portman might run for president in 2016. Sabato forecasted: "[Portman] might have an edge in 2016. Americans tire of their incumbent presidents, and often choose a very different successor with dissimilar characteristics. Portman is all steak and no sizzle." In October 2014, students from the College of William and Mary formed the Draft Rob Portman PAC to encourage Portman to run for president in 2016. However, Portman announced in December 2014 that he would not run for president and would instead seek a second term in the United States Senate.
Portman and Senator Ben Cardin (D-Maryland) proposed the Israel Anti-Boycott Act in late 2018 which would make it illegal for companies to engage in boycotts against Israel. Cardin and Portman have been strongly in promotion of the bill, working to integrate it into larger spending legislation to be signed by President Trump.