Does Trump Need a Unified GOP?

When Donald Trump told ABC's George Stephanopoulos in an interview on Sunday that he didn't think the Republican Party needed to be unified behind his candidacy, it wasn't really clear what he meant.

Donald Trump is poised to breeze through another round of primary contests this week -- while the Republican Party splinters around him.

Trump's ascent to the top of the GOP, which was capped last week with Ted Cruz's devastating loss in the Indiana primary, happened so fast that even the billionaire himself was surprised. And the whipsawed party establishment now faces immediate choices -- none of which particularly appeal to them.