Of course they can. It's their mic.
“Of course they can. It’s their mic.”
You mean you think that while Trump is talking and making his point, they will mute his mic before the world. They are not quite that stupid. Much too blatant.
All Trump has to do is get up and walk off, the first time. The whiny bitch Chris Wallace interrupted Trump, but he would not have dared to mute his mic.