Olivia Troye, a former Trump White House National Security official, is on stage -- one of several Republicans scheduled to speak during the DNC this week.

In 2020, the New Jersey senator mounted a campaign for the Democratic nomination after decades on the rise within the party.

The theme of his campaign was unity and love. His optimistic messaging was on display again tonight as he spoke.

"We're not going to lose our faith," he said. "Look, I want everybody in here to let us all say it together: I believe in America."

The crowd repeated the phrase back to him.

As the programming shifts to border security, Texas Rep. Veronica Escobar said that former President Donald Trump and his imitators see the border as a "political opportunity to exploit instead of an issue to address."

"They are not serious people. You know who is serious? Kamala Harris," she said, talking about Harris' visit to El Paso engaging with stakeholders.

"She recognized that the situation at the border is complicated -- as filled with challenges as it is with opportunities," Escobar said.

Maren Morris is now performing at the DNC.

The singer had a public break with the country music industry last year over what she said was its inability to tackle racism and misogyny.

In an interview with the Los Angeles Times, she said the Trump-era exacerbated those issues.

"After the Trump years, people's biases were on full display," she said. "It just revealed who people really were and that they were proud to be misogynistic and racist and homophobic and transphobic. All these things were being celebrated, and it was weirdly dovetailing with this hyper-masculine branch of country music."