William Henry Harrison had the longest inauguration speech and shortest administration of any American president. He died 32 days after taking office.
He’s famous for that, for being the oldest American President until Ronald Reagan, for his campaign slogan, “Tippecanoe and Tyler Too,” and not much else. His Presidential campaign was a forerunner of modern campaigns; he ran as a Washington outsider and everyman when he was in fact a patrician and Washington insider. And he had a catchy campaign song.
Many people believe he died of pneumonia contracted when he gave his long address, but the evidence doesn’t support that. For one thing, he didn’t get sick until three weeks after delivering the address. No, modern investigation points to the White House itself as the culprit.