Unnerved and exposed, Trump struggles to regain campaign mojo [Video]

Donald Trump has never lacked for self-confidence, but his presidential campaign has been sent into a tailspin by the extraordinary events of the past month, and suddenly he appears older, more awkward and grasping for direction.

An assassination attempt, the shock withdrawal of Joe Biden from the White House race and replacement by his younger, high-energy vice president, Kamala Harris, all seem to have taken a toll on a candidate who — until recently — had seemed well on course for victory in November.

President Biden’s exit has been particularly impactful, removing a rival whose 81 years, faltering speech and physical frailties had largely shielded Trump from scrutiny of his own age and weaknesses.

Now it is Trump, 78, who is the oldest presidential nominee in history, and the point of comparison is a 59-year-old former prosecutor who has come out fast and swinging.

Trump is “very upset” as he …