The Wall Street created this informative video on the 2016 GOP rule committee and the bounds of the group. They meet a week before the national convention to layout rules for the nomination and the process.

According to the Rules of the Republican Party, which the party adopted on August 24th, 2020, and amended by the National Committee on August 13th, 2021, to be a candidate for nomination, you need the “plurality of the delegates from each of five or more states.” The threshold was changed in 2020, before this, a nominee required the majority of delegates from eight states.