Democratic presidential candidates Bernie Sanders, left, Hillary Rodham Clinton and Martin O'Malley take the stage before a Democratic presidential primary debate, Nov. 14, 2015, in Des Moines, Iowa.
Photo by Charlie Neibergall/AP

Quiz: What’s changed since the last Democratic debate?

Hillary Clinton, Bernie Sanders, and Martin O’Malley will go head to head in the third Democratic debate on Saturday — the last of 2015. The debate, which is hosted by ABC, will take place in Manchester, New Hampshire, at St. Anselm College. Since November, the candidates have gained various endorsements and the polls have continued to fluctuate.

Have you kept up with the Democratic candidates since the last debate? Test your knowledge with this quiz.

The candidate even pledged to go a “step further” to ensure that the wealthiest Americans are taking on more of the tax burden.

The candidate called for every “responsible American” to speak out against Trump’s proposal.

The Communications Workers of America union represents some 700,000 workers nationally.

The Cabinet member said that this candidate “will continue fighting to ensure our children and grandchildren can achieve their highest and best dreams.”

Seventy-eight members in the state House signed onto an open letter to their colleagues announcing their support for this candidate.

Those who identify as independent or Republican-leaning, rather than as traditional Democrats, also favor this candidate.

The song “Plane Wreck at Los Gatos” is a Woody Guthrie poem, set to music by Martin Hoffman.

Bernie Sanders, Election 2016, Hillary Clinton and Martin O'Malley

Quiz: What's changed since the last Democratic debate?