I didn't realize Florida falls on the same day as some other big ones. If Rubio and Kasich don't drop out before March 15 and if they don't take their respective states (and maybe Kasich taking Illinois too), the election will be over with a Trump win. Cruz may be able to get neck and neck in delegates by that point, but if Trump takes those huge winner-take-all states, there aren't enough WTA states favorable for Cruz.