WATCH: Democrat trashes Trump's wall to his face during White House meeting

Democratic Rep. Henry Cuellar of Texas on Tuesday sparred with President Donald Trump over his proposed wall along the U.S.-Mexico border.

"I always get a kick out of people that go down and spend a few hours [at the border] and think they know the border better than some of us there," Cuellar told Trump at a White House meeting of Republican and Democratic lawmakers.

Citing data from the DEA, Cuellar said most illegal drugs were coming in through American ports -- not across the land border. And he noted that a large percentage of undocumented immigrants are the result of overstayed visas.

"You can put the most beautiful wall out there and it's not going to stop them," Cuellar remarked.

"The other thing that we've got to look at, the wall itself, talk to your Border Patrol chief or the former Border Patrol chief, I've asked them, how much time does a wall buy you? It will save a couple minutes or a few seconds. Our own border patrol chiefs have said that."

Watch video below: