The main takeaway is what we learned last month in Virginia: You can’t win if you don’t play. Former GOP senator Jeff Sessions, for now Donald Trump’s attorney general, ran unopposed in 2014. Let that sink in. Doug Jones had to be cajoled to step up, and in his victory speech he thanked his friends and advisers who demanded he run. Let’s hope Democrats commit to a 50-state strategy once again. The party ought to take over the infrastructure of Jones’s winning campaign, and try to use it to bolster its support in the state House and Senate and the US Congress too. Congresswoman Terry Sewell, an indefatigable Jones backer on national television, needs some company in Washington.