Donald Trump loves to call Mitt Romney "a choke artist" because he could not beat Barack Obama in 2012.
But Rick Santorum dropped out of the Republican race four years ago Sunday, effectively giving Romney the nomination.
At this point, in the best case scenario for Trump, he'll maintain his lead but not secure the 1,237 delegates needed to become the GOP's standard bearer until June 7, when California and New Jersey hold primaries.
In "The Art of the Deal," Trump emphasized the importance of closing the sale. "You can't con people, at least not for long," he wrote in 1987. "You can create excitement, you can do wonderful promotion and get all kinds of press, and you can throw in a little hyperbole. But if you don't deliver the goods, people will eventually catch on."
Once again, Trump struggled last weekend to deliver the goods. And often it was attributable as much or more to his own campaign's organizational failures than to Ted Cruz being a brilliant tactician.