It was the last question of the night.

Mike Pence had been fielding a handful of questions from audience members at a town hall meeting at Lancaster Host Resort on Aug. 9.

Then Zack Mongeillo took the microphone. He asked Pence if he would work to help pass Right to Try legislation in Washington, D.C. if he and Donald Trump were elected.

After telling Pence that his father was dying, Mongeillo was overcome with emotion and unable to continue. Pence left the stage to comfort him. Watch the emotional moment in the video above.

Right to Try legislation allows terminally ill patients to use experimental therapies (including drugs) that have passed basic safety testing, but are not yet FDA-approved. For more information on the case for the laws, go to righttotry.org.

Critics of Right to Try legislation argue that the FDA's compassionate-use process accomplishes the same task without undermining clinical trials as a whole or putting patients at risk.