Remember how loud his snifling was? And his mic was way lower and farther away from his mouth than Hilliary’s was. Since his snifling was probably magnified, then so was his voice and he came across very loud and somewhat bombastic and overpowering whereas Hilliary sounded calm.
So his incoming sound was not loud enough and his outgoing was tuned way too loud. He was at a real disadvantage.
Rather than the mic being bad, I suspect the sound manager had the treble turned all the way up.
Use an equalizer to zoom into the snifling frequency, and boost that freq!