For comparison, this is how Trump used to talk, back in the 2016 RNC debate.
He’s always been an obnoxious and crass New Yorker, never what you’d call an intellectual or academic. But he used to stay on topic, finish sentences, make coherent points, and generally function. Now he’s reduced to somehow shouting and mumbling at the same time, confusing names and years, connecting vague concepts together until he gets applause from the audience.
You got a source for that $6 billion? I’ve tried searching around and can’t find that anywhere.
Every study I’ve ever seen has shown that funding the IRS is a net benefit to tax revenue. So my instinct is that the $6 billion you saw included more than just this particular campaign.