Here's A Round-By-Round Guide To A Contested GOP Convention

You'd be excused if you tuned out in previous years when the actual nominating part of a political convention occurred. Usually it's a pro forma exercise with little suspense, as each state ticks off its vote for the eventual nominee. And that nominee has been known well in advance — at least for the last 40 years, anyway.

But this year a contested convention actually seems possible, if not probable, on the Republican side. It's the stuff of journalists' dreams and political consultants' nightmares....
http://www.npr.org/2016/04/21/474581419/heres-a-round-by-round-guide-to-a-contested-gop-convention?ft=nprml&f=1001