All caucus and primaries before March 15th, including the SEC (Texas) award their delegates proportionately.
Nobody starts running away with it (including Trump) until Florida.
Then it's a long sled of big, winner-take-all states with very large media markets.
FL, NY, PA, OH, NC, CA and many more.
It will be at least late April before the outcome is known.
And it would be downright thrilling if everything came down to California on June 7th with it's winner-take-all 172 delegates.
Epic.
We’ll see what happens ..