The vice president of the National Border Patrol Council on Tuesday challenged Democrats who are skeptical about the national emergency at the southern border to visit and see the crisis firsthand.

Following President Trump's threat to close the U.S.-Mexico border, several Democrats -- including Rep. Henry Cueller (Texas), Rep. Filemon Vela Jr. (Texas) and 2020 presidential candidate Julian Castro -- spoke out forcefully against the Trump administration's immigration policies.

"I haven't seen any of them down here working with us, I haven't seen any of them down here asking to speak to any of us," Art del Cueto said on "America's Newsroom" Tuesday. "I have an open invitation. They can come down and I'll show them the issues [and] what's happening at the border."

He explained that Border Patrol agents are being "overrun" by the surge of migrants seeking amnesty in the U.S., and they don't have enough personnel or facilities.

"We are definitely at a crisis and it's an emergency," del Cueto said. "In the end, something needs to be done about the overflow of these individuals that are coming into the country."

He said he supports Trump in however the president decides to address the crisis, even if that means closing the southern border.

"If there's other countries that are facilitating this invasion, they need to step up to the plate and start doing something about it," del Cueto said.

He added that it's easy for Democrats to condemn Trump's threat to close the border when they haven't taken the time to look at the crisis themselves.

"They haven't even bothered to come and speak to the agents and the boots on the ground and ask what we need, what is it that they need out there," del Cueto said. "We're seriously overrun."

Watch the "America's Newsroom" interview above.

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