Maddie McGarvey for CNN

After the debate, Beto O'Rourke was asked if Rep. Alexandria Ocasio-Cortez's endorsement of Sen. Bernie Sanders will change the 2020 race.

Here's what he said:

"This race is about America and not one faction or part of the Democratic party," he told reporters after the debate.

O'Rourke went on to talk about his record, saying he's shown that he can bring Democrats "in record numbers in Texas" and independents.

"I think that's the way that we beat Donald Trump and that's the way that we run a bold, progressive agenda and we've done this and we've done it fearlessly talking about the issues that matter most to our fellow Americans, so that's what I am going to stay focused on," he said.