I think a line was crossed; there was a rebate and that is just not permitted.

That was what crossed the line,

If I'd had some set idea of a finish line, don't you think I would have crossed it years ago?

I stepped over the boundary ... I crossed the line, ... I've worked very hard, and you know what? I think I just destroyed it all.

That brinkmanship for the most part has worked for him. He's crossed red line after red line,

The bottom line is that in an American interrogation, no physical coercion is permitted, not even the threat of physical coercion.