There were three candidates and two of them were jokes. Everyone that would have been a real threat hung back, hoping to rise either under Trump or after him. He sure wasn't taking it seriously, neglecting to even register in some states, causing the Haley loss to 'none of these candidates' in Nevada

Do you think the real threats were colluding with Trump? Otherwise, I don't see how Trump being extremely popular within his party means the primary wasn't legitimate.