Trump rallies had to turn away more people than the number that attended the Cruz rallies.
Obama's rallies in 2012 were pretty pitiful, too, but he still won.
Elections are not decided on how many people show up to campaign rallies. They're decided on who shows up to the polls.
If we're going to judge a candidate on the size of his crowds, then you can say hello to President Bernie Sanders, who's outdrawing everyone.