Sen. Lindsey Graham, R-S.C., warned Mexico that their trade agreement with the U.S. and Canada may be in jeopardy if the country doesn’t help Trump stymie a caravan of migrants from Central America who are headed to the U.S.

“To our friends in Mexico, if you don’t help Trump stop this caravan, you’re going to pay a price in Congress when it comes to this trade deal,” Graham told Fox News’ Laura Ingraham Monday evening.

Congress has yet to vote on the U.S.-Mexico-Canada Agreement, which would replace the North American Free Trade Agreement. The new deal offers adjustments such as requiring 75 percent of a car's components to be made in North America in order to be exempt from tariffs.

Congress has 60 days to approve the deal after it has been officially signed, which is expected to occur later next month. Senate Majority Whip John Cornyn, R-Texas, has indicated that Congress may not address the legislation until 2019.

The Trump administration announced Monday that 5,200 troops will be sent to the U.S.-Mexican border before the caravan of thousands of migrants arrives. The troops are expected to assist with engineering projects, and constructing temporary barriers and fencing, among other tasks, but not U.S. immigration law enforcement.

Temporary work permits, medical care, and other benefits have been extended to migrants if they stay in two Mexican states, Chiapas and Oaxaca, and register with authorities, but the offer has been dismissed by most people in the caravan.