Bush et al. help Trump win
According to the NY Times, the Republican Party leaders are seriously mad at the establishment candidates (Rubio, Bush, Christie and Kasich) for attacking each other instead of going after Trump and Cruz. Bush is especially guilty for using his massive super PAC money to run anti-Rubio ads.
My analysis: these establishment candidates are behaving this way because they continue to cling to the belief (which until this month was the mainstream belief) that Trump will magically go away and Cruz is just a far-right guy like Huckabee or Santorum who only wins in Iowa and a handful of southern Bible-belt states, and thus the real race is between Rubio, Bush, Christie and Kasich.
I predict that they will hang on to this blue-pill belief until the bitter end. And then, finally, they will capitulate to the liberal MSM viewpoint that Republicans (other Republicans) were responsible for making the voters “angry” and in the future they need to cooperate more with the liberals.