I disagree. With Jeb’s financial backing, no one else would’ve gained traction before it was a done deal. It was Trump’s self-funding and ability to get publicity that prevented Jeb’s campaign from gaining traction.
We might disagree on rigged, to me "mainstream" Republicans attempting to elect a "mainstream" Republican candidate isn't rigged, just politics as usual. And they lost. Rigged to me is when the dead people in Chicago vote in three different precincts.