"Our goal is to have an open convention in Cleveland, where we are confident a candidate capable of uniting the party and winning in November will emerge as the nominee," Weaver said in the statement. He went on to detail how the winner-take-all nature of Indiana affected their decision to "give the Cruz campaign a clear path" in that state.

In turn, we will focus our time and resources in New Mexico and Oregon, both areas that are structurally similar to the Northeast politically, where Gov. Kasich is performing well," Weaver said.

"The state's Republican Party has already selected the 57 people who will go to the national convention as delegates, and no matter the outcome of the May 3 vote, those are the 57 people going to the convention. They will only be bound for the first ballot, which could be a source of hope for Kasich."