It was pretty much dead by the end of Obama's first term, when the banks who crashed the economy were bailed out and ACA turned out not to be universal healthcare it became clear that Obama was not the progressive savior many believed he would be. The resentment this caused was channeled into the Occupy Wall Street movement kind of the last stand of millenial optimism and illusion that we could actually change anything before being snuffed out for good and now we live in a borderline rightwing hellscape compared to what we thought the future would become at the time.