"There is no question that there is a civil war that is waging within the party."
That Republican conflict, political science professor David Cohen adds, isn't between just two sides, but among a number of factions, including libertarians.
One of the most public battles has involved national security and civil liberties. Leaks about the National Security Agency's surveillance programs raised alarms for libertarians about the government's reach.
Following through on an earlier warning, the Republican National Committee on Friday "unanimously passed a resolution preventing the committee from partnering with CNN and NBC for debates if they don't drop their Hillary Clinton productions ahead of the 2016 presidential election."
"CNN and NBC have shown clear favoritism, and they won't be hosting a single Republican primary debate," said RNC Chairman Reince Priebus.
Congressional Republicans agree that the new federal health care program should be ended. But they are finding themselves bitterly divided over how.
They have tried dozens of times to repeal it. Now, some GOP lawmakers want to block all money for Obamacare in a stopgap spending bill that must be approved next month to prevent the government from shutting down on Oct. 1. But other Republicans say that won't work and may well backfire.