Irrelevant. Presidents are attacked daily, often unfairly and viciously. Presidents are above responding to it. Trump isn't. This is his weak spot, and he is showing his "tell" to the media. They'll figure it out and exploit it. He should wise up soon.
Young voters will enjoy the show, and vote for him because of it... but mature voters will get turned off, and they are more likely to actually show up at the polls on that Tuesday.
Trump isn’t a President yet.
Obama has never been “Presidential”, yet he has had two terms to make America stink. Bush never rose up to refute any of the attacks on him. He let people tell deliberate lies about him with no response. It ruined his Presidency and sucked the spirit out of his supporters.
The media would love another Bush like candidate that a goofball like Biden or Warren would beat easily.
Most people really just want someone to get in there and reverse what can be reversed. It won’t be an easy task so it will take a big presence to do it. The faint hearted need not apply.