Hillary Clinton's book tour across America is the cash and attention grab that no one in her own party wants. It might as well count as a contribution to the Reelect Trump campaign. And that's what it is.
The Democrats need Hillary to go away. But it's too late.
Her campaign people already dragged the Dems into the Russia conspiracy theory as an excuse for her defeat. And the Dem base is more fixated on that than anything else. The media has been selling the left on the idea that any day now Trump will be impeached. The party pros know better, but they also can't talk back to the loudest and angriest elements of their own movement.
Having trashed the party a second time, Hillary is beginning her triumphal defeat tour while trying to cadge some more cash for her pet projects at a time when Dem fundraising is low. This just further associates an unpopular and unlikable candidate with the Dems at a time when they need a new identity.
What happened? Hillary happened. The Clintons happened.