The announcement of Guillén's resignation came the same day Mexico's government released the text of an agreement signed last week between the U.S. and Mexico, which states that the two countries will begin negotiations on plans for Mexico to share some of the burden of processing refugee claims at the southern U.S. border. López Obrador's government has reportedly sought to get control of the flow of migrants heading north through the country since taking office months ago and recently announced plans to send the country's national guard to its southern border with Guatemala. President Trump threatened recently to impose tariffs on Mexico if the country did not substantially reduce the number of migrants heading to the southern border of the U.S. https://thehill.com/latino/448691-mexicos-immigration-chief-resigns-amid-us-pressure-over-migrants Apparently the former immigration chief wasn't seeing eye to eye with the new Mexican President over its own border security. Trumps new policy makes Mexico an asylum buffer, and he's also in talks with Guatemala to do the same. Glad to see Mexico on board-now lets see them prove it.