Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsTrump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status White House officials voted by show of hands on 2018 family separations: report MORE said Tuesday that he expects Congress to fund President Trump's campaign promise of building a wall along the Mexican border.

"I know he's going to battle for that, and I believe he will get funding for the wall. I can't imagine Congress to deny him that," Sessions said on Fox News's "Hannity." "It doesn't have to be every foot of the entire 1,700[-mile] border, we know that."

"We need a wall. A barrier multiplies the ability of our border patrol and customs officers to be effective. They tell me that and I know they've told you that in the past. This is the way to go. If we follow through on this, we can secure this border. It will be a historic thing and something that the border patrol and our [Immigration and Customs Enforcement] officers and our customs people are really excited about," added Sessions, who spoke with Customs and Border Patrol agents on the Mexican border earlier Tuesday.

Sessions also touted recent numbers from the Department of Homeland Security that show a drop in those detained crossing the border illegally.

“Can you believe that we've had the lowest number of entrances at the border in 17 years?” Sessions said.

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Sessions echoed Trump’s repeated campaign criticism that former President Obama did not do enough to secure the border.

“I knew strong presidential leadership, unlike the wishy-washiness we’ve seen in the past, would impact the flow, but not as much as we've seen already. The numbers are down 70 percent since President Obama left office. It's really a remarkable achievement,” Sessions added.