I think jeb Marco would be a tough ticket to beat but they're from the same state.That's what the ticket should be. Trump is the most popular of all the GOP candidates. Bush is a joke, who will fade out of the race, and has been losing popularity already, while Trump has been steadily gaining. Trump and Cruz would make a good ticket. Trump is 69 years old, has lots of business and foreign policy experience. Cruz is 45 and a rookie senator but with 8 years of being vice-president, he'd be fin to run for president in 2024.
Also, Trump while denouncing Bush and Rubio as the immigrationists that they are, he has praised Cruz for his tough stance against illegal immigration, and Cruz is worthy of the praise. Both would be tough against China, Mexico, Iran, ISIS, Saudi Arabia, and other enemies of the USA. That's what America needs right now. Tough leaders in the White House who can command respect - not more weakness.