Mexico is fighting President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE’s proposed border wall because it wants to continue allowing people and drugs to move into the U.S., White House aide Kellyanne Conway Kellyanne Elizabeth ConwayGeorge Conway hits Trump on 9/11 anniversary: 'The greatest threat to the safety and security of Americans' Juan Williams: Swamp creature at the White House Oversight Democrats press for probe into possible Hatch Act violations MORE said Friday.

“They don't want it, Gayle, because they want to continue to allow people — and, I assume, drugs, since they're not doing much to stop that — pouring over our borders," Conway told CBS host Gayle King, referring to the border wall.

“We have to look at America. Mexico should pay for that wall because they get an awful lot from this country through [the North American Free Trade Agreement] and through other monetary disbursements.”

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Conway said Mexico’s decision to extradite drug lord Joaquin “El Chapo” Guzman was “one small step” in the right direction.

Trump launched his presidential bid by demanding a crackdown on immigration and calling Mexican immigrants “rapists” and “criminals.” The construction of a massive wall along the southern border of the U.S. and the promise that Mexico would pay for it became rallying points for his campaign.

The president took his first actions on immigration Wednesday, signing an order authorizing the construction of the wall, which he has claimed will stymie the flow of drugs and illegal immigrants across the border.

But some lawmakers have questioned the efficacy of the wall, arguing it would be an expensive endeavor that would not actually make the border any more secure.