Trump is on a tour of battleground states during this week's Democratic National Convention.
Trump last visited Arizona in June when he toured border wall construction in Yuma and held a rally in Phoenix.
Arizona Representatives Paul Gosar and Debbie Lesko also joined the President during his trip to Yuma.
After visiting the border wall, Trump delivered remarks on what the White House says is "Joe Biden's failures on immigration and border security."
Many people attended the speech, and while social distancing measures were encouraged, many of the attendees were not wearing masks.
“The Biden plan would unleash a flood of illegal immigration like the world has never seen. It's crazy. Biden's plan is the most radical, extreme, reckless, dangerous and deadly immigration plan ever put forward by a major party candidate," said Trump.
During the speech, Trump also focused his attention on COVID-19, lowering taxes, and Biden's new running mate, Kamala Harris.
"She is not the right pick, but she was my number one draft pick," said Trump. "They asked me that. What do you think I said? I'm very happy. They thought I was happy. They thought I was happy for him. No, I was happy for me."
Arizona has traditionally been a red state in presidential elections, having voted for Republican candidates. However, changing demographics and migration from solidly blue states have gradually shifted Arizona purple.
In 2016, Trump carried Arizona by about three percentage points, and recently, a RealClearPolitics average of polls shows the President trailing Biden by two points.
Arizona Democratic Party Chair responds
Felicia Rotellini, the chair of the Arizona Democratic Party, responded to Trump's visit.
“The reason Donald Trump is coming to Arizona is because he is desperate and he knows he losing the state. Joe Biden has a long-standing relationship with Arizonans. It’s not about presence in the state. It’s about the values and what he’s fighting for," said Rotellini.