OK, there is no excitement in the GOP primaries over the nominee, since we have known since 2008 that Romney is 'next in line'. But actually there IS a race on - it is for who will be 'next in line' for the next time.
The 'next in line' rules are
1) any member of the Bush Dynasty (if Jeb ever decides to run, he is automatically "next")
2) a sitting vice president
3) the VP candidate and/or runner up in the primaries.
#3 is what the race is all about right now.