It says ACTING AS PRESIDENT. As in fulfilling presidential duties without being sworn in.
“no person who has held the office of President, or acted as President”
So CLEARLY a person ACTING as President has NOT held the office of President.
“Acting as President” refers to anyone who takes the place of the president, such as VP Truman taking over for FDR, LBJ taking over for JFK, or Bush 1 when Reagan was shot and in surgery, or when Cheney has been in charge when Bush 2 has been in surgery. It also includes anyone in the ‘line of succession’ to the presidency (Speaker, cabinet secretaries, etc) who is not directly elected to the office.
If there were anything to this challenge I’d be for it, but I think people are just really stretching to make a wish here. I personally am in favor of her squandering millions and millions of her campaign dollars and not being elected. Less money going to other rats who may have more electability.