Literally the dumbest thing Democrats can do at this point is "oh well, just a weird fluke, we did nothing wrong, carry on 
"
No, the dumbest thing we can do is drastically overreact and completely change our strategy that's won us the most votes in 6 of the last 7 elections.
Did Hillary have some weaknesses? Sure. Should we try to nominate a candidate in 2020 that can win by MORE than 3,000,000, in case the electoral college fluke happens again? Yes. Are things so bad that we need to reinvent the party from scratch? Of course not.
