Muhammad Jusuf Kalla, commonly referred to by his initials JK, is an Indonesian politician and businessman who served as the 10th and 12th vice president of Indonesia, the only vice president in Indonesian history to serve two non-consecutive terms in office. He was unsuccessful as Golkar's presidential nominee in the 2009 presidential election. Before Kalla declared himself as the running mate for Joko Widodo in the 2014 presidential election, a 2012 poll placed his popularity among likely voters in the top three contenders for the presidency and ahead of his own party's nominee Aburizal Bakrie.

The vice president of the Republic of Indonesia is second-highest officer in the executive branch of the Indonesian government, after the president, and ranks first in the presidential line of succession. Since 2004, the president and vice president are directly elected to a five-year term.