I'm actually surprised she caught that. She's getting better. In the past there is no way she would have caught on to "millions of miles" being a mistake.
All the people that called Dan Quayle stupid owe him an apology. Yeah, he had some stupid quotes & gaffes. But nowhere near the level and frequency of Heels-Up Harris. Not even close.
During the presidential administration of 41 the press highlighted every single one. They try to bury them for HUH. It's just that there are too many to hide for her.