PAHRUMP, NEV. -- Two Nevada delegations are packing their bags for the Republican National Convention Sept. 1, and if the latest party ruling stands, neither of them will be seated.

A fiasco at the state convention spawned the dueling delegations -- one for John McCain and one for Ron Paul -- and their continued wrangling has exposed a split in the party that may spell trouble in a key state for the presumptive Republican presidential nominee.

Running...