Poll: What Was the Key Issue Debated Tonight?

Republican presidential nominee Donald Trump and Democratic presidential nominee Hillary Clinton shake hands after the Presidential Debate at Hofstra University on September 26, 2016 in Hempstead, New York. The first of four debates for the 2016 Election, three Presidential and one Vice Presidential, is moderated by NBC's Lester Holt.
Spencer Platt/Getty Images

Donald Trump and Hillary Clinton went head-to-head for the first time Monday night in a presidential debate at Hofstra University, moderated by NBC News’s Lester Holt.

Over the course of the evening, the candidates spent an inordinate amount of time on frivolous issues like Trump’s tax returns, who first pushed questions about Barack Obama’s birth certificate, and when Trump first said he opposed the Iraq War.

Here, you can weigh in on which substantive issue was the most important one discussed during the debate: