Protesters briefly interrupt Houston Democratic debate

Beneficiaries of the Deferred Action for Childhood Arrivals (DACA) program briefly interrupted former Vice President Joe BidenJoe BidenTrump hits Fox News's Chris Wallace over Ukraine coverage Schiff: Whistleblower testimony might not be necessary Trump warns Democrats will lose House seats over impeachment MORE’s answer to the final question at Thursday night's Democratic presidential debate.

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Biden began to answer a question from moderator George StephanopoulosGeorge Robert StephanopoulosKudlow: 'I don't honestly know' if Trump was joking about China investigating Bidens The Hill's Morning Report - Trump's impeachment woes mount Jordan refuses to say whether Trump asking China for investigation was appropriate MORE about his most significant professional setback when protesters began shouting “We are DACA recipients. Our lives are at risk,” according to Jess Davidson, executive director of the group End Rape on Campus, who was present at the debate.

Participants in the protest were photographed in shirts reading “DEFEND DACA, ABOLISH ICE, CITIZENSHIP FOR ALL.”

Biden waited until the protesters were escorted out before continuing his answer, quoting the philosopher Soren Kierkegaard as he discussed the death of his wife and daughter in a car crash.

The former vice president had earlier mentioned the DACA program, which President TrumpDonald John TrumpWHCA calls on Trump to denounce video depicting him shooting media outlets Video of fake Trump shooting members of media shown at his Miami resort: report Trump hits Fox News's Chris Wallace over Ukraine coverage MORE rescinded in 2017, in an answer drawing a distinction between the Obama and Trump administrations' immigration policies.