Harris's policies didn't open the southern border. For starters, she wasn't in a position to make policy. Second, Trump has a ludicrous estimate of the number of illegal immigrants in this country. There were 2.4 million contacts last year. Most of those were just turned back. If someone were turned back they might try again. This might happen with the same individual many times. That number -- 2.4 million -- wasn't of unique individuals. That was of contacts. Trump's number (as high as 50 million successful crossings) was pulled from his ass. He won't say how that number was arrived at. The Southern border isn't the sieve that it's presented as. We had a picnic near the border in Arizona a few years ago. From the mountain we were on you could see for miles to the South. It is scanned incessantly by surveillance. The land was empty.
You can go to the southern border and see these. A long array of them scans the border constantly.
Vance knows she wasn't in a policy making position. He was lying.
Who knows what of his words Trump actually believes and what's merely said to stir the pot. There are reasonable people who believe he has gone insane. I don't. I think he's a gangster.