The prominent liberal syndicated radio and television host concisely explains the many ways President Obama has failed to live up to either his promises or his progressive potential, leaving Democrats disillusioned on the issues that matter most.

Bill Press—a progressive champion and former chair of the California Democratic Party, a one-time co-host of CNN’s Crossfire, and the popular nationally syndicated radio and television host of The Bill Press Show—reflects back on what for many progressives has been a disappointing presidency and comes to a depressing conclusion: Obama grossly misunderstood the mandate of the enthusiastic crowds that swarmed him on the campaign trail. Instead of recognizing their burning desire for strong progressive leadership, Obama tried to be a “post-partisan” president. The tragedy of Barack Obama is that, in trying to become the great uniter, he has instead become a grave disappointment.

From climate change to gun safety to, yes, even health care, Obama’s legacy on important issues falls far short of what could have been. Time and again, he let down his most impassioned supporters—the ones who used their powerful voices to vote for change—neglecting their priorities and wasting his potential by either not doing enough or, worse, repeating the errors of his predecessor.

President Obama rode into office on a celebratory tide of liberal jubilation, but as his typically centrist presidency comes to a close, he leaves his supporters haunted by what might have been.