Wearied by the hotly contested "Log Cabin and Hard Cider" campaign that unseated the Democratic incumbent, Martin Van Buren, Harrison succumbed to pneumonia after only one month in office, the first chief executive to die in the White House. His death precipitated a governmental crisis, which Vice President John Tyler promptly resolved--to the consternation of his Whig Party--by claiming the office and title of president, thus setting a precedent...