on presidential stability

America's first 13 presidential terms (from Washington's first through Van Buren's only) all went off without a hitch. By that I mean they began and ended at the scheduled inauguration date -- none of them died or otherwise left office during a term, or started in the middle of a term. Since then we have not had as long a string of stability. The second longest streak, our current one. It started with Jimmy Carter, and has had ten complete terms with no interruption. Assuming President Trump doesn't die or get removed in the next 13 months, current streak will hit 11. After that, it's a long way down to the third longest streak, which lasted five terms. That was the one that began with the term to which Coolidge was elected in 1924 and ran through Roosevelt's third term. Note that Coolidge became President in 1923 when Harding died, and Roosevelt was elected to a fourth term, but died shortly into it. So, yay for us!