Donald Trump's GOP civil war

Donald Trump is tearing the Grand Old Party apart. The tension that has simmered in the Republican Party for years -- shutting down the government and nearly bringing the nation to default -- escalated into an outright civil war Tuesday. The conflict not only threatens the party's ability to make any realistic attempt at reclaiming the White House next month, but also previews the conflicts and divides that could consume the GOP for years to come if Trump loses.