How to Stop the Circus
Here's my three-fold solution to problems that we've witnessed in the presidential debates: (a) remind the audience that they're not attending an episode of the Jerry Springer show, and remove them if they fail to show basic decorum, (b) temporarily cut the mics of candidates who persistently interrupt or go over their time (this is very easy to do), and (c) eject uncooperative candidates off the stage. The last idea might sound unrealistic, but I think it's completely justifiable given what's at stake.