Gee, you think if he had said it, he would have owned it as soon as it was mentioned along the lines of: “Yes, I said it. I’m not walking it back it. Here’s why...”
If he wasn’t sure, he could have said, “Frankly, I can’t immediately recall if I said that. But let’s say I did. It’s still true and here’s why...”
Oh, well. He’s no worse than all the other politicians that insist they didn’t say something despite being on the record of saying exactly that.
Rubio, Bush, interchangeable. Who cares? Proverbial tempest in a teapot.