This is why I think he's going to drop out.
All of the media companies trying to burry him, donors are panicking, and party elders are asking him to take cognitive tests on TV.
This will continue through Nov., and he doesn't command enough loyalty and/or fear to bring people back into line.
He's been a great president on domestic policy, and foreign policy (excluding the middle east).
But you can't win when large parts of the party and donor class are agitating against you, creating a drumbeat of negative stories about your biggest weakness (perceived to be too old) on a daily basis.