There was a time when the very concept of a conflict of interest in politics was a serious matter that could cause investigations and resignations in the federal government. Long before Watergate, Richard Nixon was famously accused of corruption when it was revealed at the height of the 1952 presidential election, in which he was Dwight D. Eisenhower’s running mate, that some supporters had set up a slush fund to help pay for his expenses. Nixon went on television and delivered his famous “Checkers” speech to upwards of 60 million people, insisting that his wife Pat wore a respectable Republican cloth coat and that they intended to keep Checkers, the little dog a supporter had given to his daughters. He got away with it that time, but the moniker ‘Tricky Dick” stuck with him throughout his political career.  Nixon wasn’t the only Republican dogged by conflict of interest accusations in the 1950s. Sherman Adams, Eisenhower’s chief of staff, resigned in 1958 after refusing to answer questions about a vicuña coat and an Asian rug given …