The national party is apparently concerned those delegates would then ignore party rules that would bind them to vote for Romney on the first round of balloting.

"If a prospective delegate’s name is certified to the RNC but has not been approved by an authorized representative of the candidate he or she professes to support, grounds for a contest may exist," Phillippe wrote. "In any case, to the extent a prospective delegate is purportedly elected in excess of the number of slots allocated to his or her preferred candidate, such delegate will be bound to vote at the national convention for the candidate to whom that delegate was allocated."

The national Republican organization is increasingly anxious over the ability of the Paul campaign to take over state-level organizations, especially in states like Iowa and Nevada that have outsized importance on the nominating process. National Republicans worry that if grassroots party loyalists aren't supporting the presumptive nominee, the party could struggle against President Obama's fundraising and organizational efforts. But Paul supporters say they should be credited for their ability to organize and win all-important delegates.

The congressman himself said Monday that his campaign was "doing very, very well" by exploiting some of the party's more obscure delegate selection rules.

"Just look at this last week. The news is very favorable to us. We could even end up winning Iowa, ironically enough. In Minnesota, we're doing well, and Maine, Nevada and Missouri. We're doing very, very well. Some of the states we could very well win or come up very much because the delegate process is completely different than these straw votes," Paul told Bloomberg TV. 

"We're pleased. ... It's another month or so until they count all the delegates and we find out where we stand."