The whole embarrassing mess is available on the Bloomberg YT channel. Trump starts about an hour in.
Trump was not getting hostile questions and grilled in that interview.
John was overly polite and respectful, and indeed let Trump ramble on various occasions, even after being insulted by Trump.
He was just trying to keep Trump on point, and to fact check when Trump started lying, which began after the first question.
Trumps modus operandi is just to start talking, (and sniffing), and to keep rambling, (and sniffing), and not let the interviewer take back control.
His "weave" ramblings remind me of Grampa Simpson, except Simpson is just a comical cartoon character....oh wait !!!