Donald Trump may be a favorite son, but whether he can win the April 18 NY primary is an open question. True GOP areas like WNY (Carl Country) may go for him, but the RINO sections where Republicans vote for Cuomo and Schumer....well The Donald will have trouble there.
Elected officials are afraid to endorse him, partly due to fear of media ridicule. A lot of the people backing Bush or Christie are homeless but Chairman Cox will herd them to Rubio no doubt.
If March 1 and March 15 go heavily for Trump the NY primary may not matter, but with the party establishment rallying against Trump, the battle may extend that far into the Spring.