Organized labor still seems supportive of left leaning candidates. If they had "abandoned" them you'd think it would show.
I don't buy into these ideas that <observes behavior that doesn't jive in some way> must be directly related to <pet peeve of mine>.
Voters behave in unexpected ways all the time.
A left-leaning candidate that has "abandoned" worker's causes is still a better prospect than a candidate that openly opposed to them.
I find it odd that so few people vote in the US - like I said, if all candidates are terrible, one is certainly less terrible and your job, as citizen, is to vote for the lesser evil to prevent the worse one to get power.
People are uneducated, don't have time, and rightly feel like politicians don't represent them. No one wants to have no home or the worst health care system except the people taking bribes. There's no incentive for reform.
There isn't an asterisk next to your vote that says "this person disagrees with this candidate's platform". No, your vote will be used to legitimize that candidate's platform to other people, future generations, and the history books.