I don’t drink and never have, so am certainly no expert on the behavior of drunks, but Harris seemed almost weepy. She was rambling to the beat of her head bob as usual and made zero sense. If weepy, nonsensical rambling is a sign of drunkenness, then she definitely was drunk.
I am a lifelong drunk and love booze. Why I don’t drink. That behavior is not of a drunk. Believe me. I know. As others have guessed she is on opioids or some kind of depressant. I have zero doubt she is popping pills. I don’t know which ones though.