MANCHESTER, NEW HAMPSHIRE - FEBRUARY 07: (L-R) Democratic presidential candidates Sen. Elizabeth Warren (D-MA), former Vice President Joe Biden and Sen. Bernie Sanders (I-VT) participate in the Democratic presidential primary debate in the Sullivan Arena at St. Anselm College on February 07, 2020 in Manchester, New Hampshire. Seven candidates qualified for the second Democratic presidential primary debate of 2020 which comes just days before the New Hampshire primary on February 11. (Photo by Joe Raedle/Getty Images)
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Biden asks crowd to stand and applaud Lt. Col. Vindman
Former Vice President Joe Biden asked the audience at ABC's Democratic presidential debate to stand for Lt. Col. Alexander Vindman, a key impeachment witness who President Trump fired hours before the debate.
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ABC 2020 Democratic Debate 7 videos
MANCHESTER, NEW HAMPSHIRE - FEBRUARY 07: (L-R) Democratic presidential candidates Sen. Elizabeth Warren (D-MA), former Vice President Joe Biden and Sen. Bernie Sanders (I-VT) participate in the Democratic presidential primary debate in the Sullivan Arena at St. Anselm College on February 07, 2020 in Manchester, New Hampshire. Seven candidates qualified for the second Democratic presidential primary debate of 2020 which comes just days before the New Hampshire primary on February 11. (Photo by Joe Raedle/Getty Images)
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Biden asks crowd to stand and applaud Lt. Col. Vindman
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Biden and Sanders hug it out at Democratic debate
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(From L) Democratic presidential hopefuls entrepreneur Andrew Yang, former Mayor of South Bend, Indiana, Pete Buttigieg, Massachusetts Senator Elizabeth Warren, former Vice President Joe Biden, Vermont Senator Bernie Sanders, Minnesota Senator Amy Klobuchar and Billionaire activist Tom Steyer arrive onstage for the eighth Democratic primary debate of the 2020 presidential campaign season co-hosted by ABC News, WMUR-TV and Apple News at St. Anselm College in Manchester, New Hampshire, on February 7, 2020. (Photo by TIMOTHY A. CLARY / AFP) (Photo by TIMOTHY A. CLARY/AFP via Getty Images)
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Klobuchar was the only 2020 hopeful to respond to this question
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MANCHESTER, NEW HAMPSHIRE - FEBRUARY 07: Democratic presidential candidate former South Bend, Indiana Mayor Pete Buttigieg participates in the Democratic presidential primary debate in the Sullivan Arena at St. Anselm College on February 07, 2020 in Manchester, New Hampshire. Seven candidates qualified for the second Democratic presidential primary debate of 2020 which comes just days before the New Hampshire primary on February 11. (Photo by Joe Raedle/Getty Images)
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