Steve Kornacki’s analysis of the Louisiana vote tonight concludes that there is evidence the vote is coalesting around Ted Cruz.
He explains it pretty well:
Basically, Trump had such a huge advantage in early voting that the later voting today means Cruz had a huge swing towards his campaign – not enough to vote, but to make it close. And that means that the vote generally is tending his way, away from Rubio. And that’s a big deal, if true.