Top 10 horrible Democratic candidates over past 20 years

[Suburbia]

Name the top 10 horrible Democratic candidates over the past 10 years who squandered the Democratic Party's opportunity at winning a Senate seat, House seat, Presidential Candidate or Vice Presidential Candidate

A couple I think of:

1. Martha Coakley (D-Mass.) Former Massachusetts Attorney General, 2007-2015. Lost special Senate election in 2010 to fill deceased Sen. Ted Kennedy's seat to Republican Scott Brown's populist appeal.
Lost 2014 Massachusetts governor's election in 2014 to Republican Charlie Baker.
2. Alex Sink (D-Florida) Former Chief Financial Officer (like a State Auditor or Comptroller), 2007-2011. Lost 2010 Florida governor's election to Republican Rick Scott.
Lost special House election FL-13 in 2014 to Republican David Jolly.

Can you think of some more? I'll make a Republican thread soon.