The big winner last night was Donald Trump. Yeah, yeah, yeah, he won some states and delegates but what makes him the big winner is the fact that both losers last night - Cruz and Rubio - are vowing to stay in the race to the end. That should be enough to leave Trump on his current glide path to the nomination.
What candidates vow and what the donors are willing to fund are two different things. Marco may want to stay in unti the end, but his vow to drive his pickup truck state to state if he has to may be the only thing his campaign is able to afford.