GOP delegates at the convention, not primary voters or caucusgoers, choose the presidential nominee, another member of the Republican National Committee told CNBC, after a similar proclamation last week by an unbound delegate from North Dakota touched off a firestorm.

"People are under the misconception that it's the results of the caucus and the results of the primary that determines who becomes the nominee. In actuality, it's the delegates at the national convention that are supposed to pick the nominee," Diana Orrock, a delegate from Nevada and Donald Trump supporter, told "Squawk Box" on Monday.

Orrock's comments nearly mirror last Wednesday's remarks on the program from North Dakotan Curly Haugland, an RNC rules committee member. He went further, questioning whether primaries and caucuses should be held at all. He also talked about his proposed rule change to allow any candidate who earns at least one delegate to submit his or her name to be nominated at this summer's convention.

"Going into this convention they're going to try to do a lot of manipulation to try to keep Trump from becoming the nominee," Orrock said Monday. "A lot of political operatives in the Republican Party are trying to take Trump out at all costs."