Jeb "Act of Love" Bush is still in because Cruz will knock Trump out after the next Trump gaffe, and then Cruz will fade like all early leaders. After that, without Trump sucking up all the attention, Jeb's millions will allow him to get his message out, and we'll realize that what we really want in a nominee is a spoiled, entitled brat who is only there because of his last name and his support for Amnesty to reward the criminals who take our jobs and commit a disproportionate share of crime in our neighborhoods.
20 out of the past 35 years, there has been a Bush in the WH as either President or Vice President. Add 8 years of Clinton and you have two families that have dominated the Presidency/Vice President for 28 of the past 35 years. And now a Bush and a Clinton want another stint in the WH.
In a country of 320 million, the best we can do is a Clinton or a Bush? It would be somewhat different if they had outstanding Presidencies, but Bush 41 and 43 and Clinton were not very good to say it mildly. We are becoming a banana republic.