Trump supporters look on as the president speaks in El Paso on Monday night. Getty Images

Donald Trump, Jr., the president's son, warms up the crowd in El Paso on Monday before the president took the stage.
Getty Images

Supporters watch as President Trump speaks to a crowd in El Paso on Monday night. Getty Images

Young people cheer on President Trump in El Paso. Getty Images

Supporters of Donald Trump hold a sign that says, "God Bless Trump," during a rally in El Paso. Getty Images

President Trump mocks Beto O'Rourke during a rally in El Paso, suggesting his crowd was larger than O'Rourke's. It wasn't immediately clear who had the larger crowd.Getty Images

A man at a Trump rally in El Paso salutes. Getty Images

A protester is removed from the Trump rally in El Paso. Getty Images

A Trump supporter yells at protesters as they're removed from the rally in El Paso. Getty Images

Trump leaves the stage of his rally on Monday. Above him is a sign that says, "Finish The Wall."Getty Images

Beto O'Rourke speaks to a crowd of marchers during the "March for Truth" in El Paso on Monday. The march took place at the same time as Trump's rally and culminated at a rally inside a baseball stadium. Getty Images

O'Rourke speaks to marchers on Monday. Getty Images

The crowd inside the baseball stadium at Beto O'Rourke's counter-rally, which followed the march. Screenshot/Global News

Beto O'Rourke speaks to the crowd at his rally on Monday. O'Rourke spoke in both English and Spanish, according to USA Today. “We, together, are making a stand for the truth against lies and hate and intolerance,” he said to the crowd. "We are going to show the country who we are.”Screenshot/Global News