There is nothing wrong with having no nominee until every state (or most of them) have held primaries and caucuses. If it goes until the Convention, so be it. It will be an excellent experience and I am confident the GOP will have a candidate that will beat Obama whether we settle on one today or in August.
This process is part of the "vettting" that every candidate needs to go through. The longer this goes on, the better we get to know these people. Personally, I am enjoying the heck out of it!
The last primary is on June 26 and that will be Colorado. So what you're saying is let this carry on--let Rick Santorum keep bringing up his Roman Catholic beliefs--keep scaring women to death--so that by the time the election rolls around they will be running into those voting booths to cast a vote for Barack Obama--even though Santorum has no possibility what-so-ever of winning the nomination.
You want to risk that?
A lot on the "right" would prefer Obama over Romney.
Some say there is no difference, in spite of the great difference there would be in SC appointees.
Some just plain would prefer that Obama win.
And there are those on the left that aren't happy with Obama and would prefer anyone else win.