Trump says he spoke to Mexico's president about ending migration into U.S.

• The U.S. president-elect said this week he would impose a 25% tariff on all goods coming from Mexico and Canada, as well as additional tariffs for China, in order to stop the flow of drugs and migrants, effective Jan. 20.

State of play: Trump said in a post on Truth Social Wednesday that he had "a wonderful conversation" with Sheinbaum, claiming she "agreed to stop Migration through Mexico, and into the United States, effectively closing our Southern Border."

• He said they also talked about "what can be done to stop the massive drug inflow into the United States, and also, U.S. consumption of these drugs."
• Sheinbaum in her own statement earlier Wednesday said she and Trump discussed Mexico's strategy on migration and that she told him caravans are not arriving at the northern border as they're being taken care of in Mexico.
• The Mexican president said they also discussed strengthening collaboration on security issues and a campaign to prevent the consumption of fentanyl.

Zoom out: Mexico has massively stepped up its immigration enforcement at its border with Guatemala, contributing largely to the drop in U.S.-Mexico border crossings.

• Under Sheinbaum's presidency, the U.S. could see continued cooperation on migration, including massive efforts from the Mexican government to detain migrants at its border with Guatemala and elsewhere in the country — before people head to the U.S., Axios' Marina E. Franco reports.
• But Trump's promises of mass deportations would entail expelling people into Mexican territory, which would draw pushback because it'd overwhelm the country's capacity to manage the flow.

Go deeper: Mexico's president would impose retaliatory tariffs in response to Trump's plan