to simplify my previous post....The Dem's don't have to rig anything when the Rep's are self-imploding. All they have to do is sit back and watch it happen.
This is precisely why it IS rigged. Any other candidate that was on the stage during the Republican debates would be mopping the floor with Hillary right now. She is the worst candidate in the history of the Democrat party, so the only way for her to win is to have someone just a little worse running against her.