Republican National Committee Chairman Reince Priebus reiterated to House Republicans Tuesday morning that the party's eventual nominee will have to earn 1,237 delegates, and that any change in the GOP's nominating rules will have to be approved by all delegates to the convention.

Speaking to lawmakers at the Capitol Hill Club Tuesday morning, Priebus said members of Congress can review conventionfacts.gop if they have questions about how the 2016 nominee will be chosen.

Priebus' explanation of the party rules comes as front runner Donald Trump continually maligns the process as rigged. Priebus' comments seem, in part, designed to explain that, in fact, the rules have been in place for some time, and party leadership cannot change them unilaterally.