As Democrats pick up the pieces after Graham Platner, many wonder: how did this happen?

The former US Senate candidate’s spectacular fall has upended the Maine Senate race and left voters fuming at the partyAlmost exactly one year ago, Graham Platner, who has no political experience, was cherry-picked by out-of-state political activists.According to a person familiar with the campaign, Daniel Moraff and Leanne Fan, who have made a name for themselves by recruiting populist candidates across the country…