Being endorsed by a Bush is tantamount to writing your own political death certificate and shows how desperate Cruz and the Establishment are getting in trying to stomp on Trump who obviously is the "people's" choice.
The Establishment has dumped millions of dollars into these losers and got zip in return. It's amazing to watch how they act and what they say and how contrary it is to that of the voters. It's no wonder there are so many angry and fed up Americans out there who are tearing this busted up political machine apart.
Even though Democrats are more civil about it, it looks like the writing is on the wall for the Establishment in that camp also. With each new primary or caucus we see more and more voters coming out and casting their ballot for the "outsider" Bernie Sanders; especially the Millennials who are not looking back but to the future and what in store for them if nothing significantly changes in the body politics as practiced in America.
As for Cruz, all the political endorsements in the world (or an act of God) will help him win the General Election if he faces off with Bernie.
Jeb Bush endorses Ted Cruz, who he says will help ‘overcome the divisiveness and vulgarity’ of Donald Trump - The Washington Post