[xzins]

Nope. They will encourage him to keep on running.

[glennaro]

And, reporting on the likely New York and California primary results, like the old joke about a two-man race (Kasich has not earned "contender" status) the headline will read:

Cruz Wins Second Place! -- Trump Finishes Next To Last!

[Lisbon1940]

Why would Trump stay in after he fails to make the number? Same reason for Cruz and Kasich.