They were running mates and had the same general political philosophy. Harding was lax in his administrative duties, spent too much time on the gold course and was pretty much over his head when it came to being president. Coolidge was a far more capable administrator having been a successful state governor and was wiser in his cabinet selections.
I believe the answer is: whether the Supreme Court could hear the case.
At that time, President Nixon wanted to use his Executive previlege to avoid the supreme court from hearing his case and argued that it's all for the sake of national security. The court ruled against nixon and ordered him to hand over the tape which lead to his impeachment during the watergate scandal.
it is a leap year I think