If you weren't so blinded by partisanship you'd see you answered your own question.
The strength of economic issues was part of the reason working class voters helped carry Obama to wins in places like Iowa, Indiana, Ohio, Virginia, North Carolina, and Florida (damn near even won Missouri).
Then they watched him turn around and kiss corporate ass, bail out the banks, hold literally none of the rich and powerful responsible. The wealthy immediately saw their wealth restored within 2 years while the working class had to settle for a largely jobless recovery where it took 10 years of slow growth to finally bring the jobs back and stagnant-ass wages the entire time.
And you act surprised that "economic voters" who helped elect him in 2008 had abandoned the party again by 2016.
Yeah, I'm sure black people voting in mass got Obama wins in fukking Iowa.
Obama did better with White voters than Gore and FAR better with White voters than Kerry. We're not just talking about liberal enclaves - Obama outperformed Kerry with Whites in Ohio, Indiana, Pennsylvania, Michigan, Virginia, and North Carolina. Even in Southern states like North Carolina, Virginia, and Florida, Obama won 35-45% of the White vote. Among working-age people the #'s were even higher - once you eliminate seniors Obama was close to a White majority in those states.
This is why I called that shyt TLR-level posting. Y'all are just throwing out useless narratives and straight ignoring reality. Notice how every single comment I've made was backed up with direct facts of who voted where and when, who got in power where and when. Whereas the counterarguments are literally just narratives with zero evidence behind them.
We're 5 pages deep in this shyt and still failing to explain how the Dems managed to back the Civil Rights Act and get 90% of the Black vote with Republicans like Nixon and Reagan blowing racist dog whistles on the regular, yet still had this result:
Dumbass from TLR is still focused on "He said Alabama!", denying the factual reality of Alabama having a Dem in the Senate from 2017-2020, because he doesn't want to have to deal with the reality of Dems also winning state-wide elections in North Dakota, Indiana, Ohio, Missouri, Florida, North Carolina, West Virginia, Louisiana, Arkansas, Iowa, South Dakota, Montana, Nebraska, South Carolina, Kentucky, Tennessee, and Maine.
That's TLR-level shyt when you can't discuss the reality of election results across over 1/2 the red states in America but need to make 3 separate comments bytching about Alabama being included.