Why exactly? Trump was widely panned for his first debate against Biden in 2020 when he wouldn’t stop interrupting and tanked the whole thing. If he does that, he loses. So I don’t think Democrats are worried about that.
And if the worry is that it won’t lend itself to each candidate being able to explicate themselves and talk productively, well I would just remind you who the two candidates are and that as it stands Harris won’t commit to more than one. I would think three would give her a much better chance to get her views out there.
What this mics and audience thing is really about is they fear the Trump one liner and the crowd going crazy.
“Because you’d be in jail”
“Oh you’re a tough guy Jeb”
“I don’t know what he just said At the end of that sentence I don’t think he evens knows what he said”
“You did beat Medicare, you beat it to death”
Trump snapping one of those off and the crowd reacting is the reason for this mics and crowd bullshit. Any other explanation is just bullshit spin.