Some people beyond Washington might consider announcing a presidential campaign in 2018 for an election in late 2020 a tad premature. Those people would be correct.
Here's how things have changed over the years in our commander-in-chief sweepstakes: John F. Kennedy announced his presidential candidacy on Jan. 2, 1960, 10 months before the election. Bill Clinton announced his 13 months before the election.
George W. Bush jumped in 17 months before. Barack Obama was 21 months out. Elizabeth Warren made it about 23 months out, and she wasn't the first.
