Just as he has for his previous nominations, Trump announced Johnson’s in a post on Truth Social.

“I am pleased to nominate Ronald (Ron) Johnson to serve as the United States Ambassador to Mexico,” Trump posted. “Ron will work closely with our great Secretary of State Nominee, Marco Rubio, to promote our Nation’s security and prosperity through strong America First Foreign Policies.”

Johnson has experience working in a Trump administration. He was appointed ambassador to the Republic of El Salvador in 2019 and served in that capacity until January 2021. The president-elect touted this previous work in the social media post announcing his nomination.  

“During my First Term, Ron served as the Ambassador to El Salvador, where he worked tirelessly with Salvadoran authorities and our team to reduce violent crime and illegal migration to the lowest levels in History,” Trump posted. 

As ambassador to Mexico, it is expected that Johnson will work to help with border security and the illegal immigration crisis. Trump mentioned as much in the post announcing Johnson’s nomination.

“Together, we will put an end to migrant crime, stop the illegal flow of Fentanyl and other dangerous drugs into our Country and, MAKE AMERICA SAFE AGAIN!” the president-elect said.

Johnson has a distinguished career in the U.S. government, having “over four decades of service” in aiding the country and dealing with numerous vital matters such as “refugees, counter-narcotics, counterterrorism, human rights, and tropical virus disease control.” He was also a Senior Advisor to the Commander of the U.S. Southern Command, where his work focused on “ interagency collaboration and providing geopolitical advice.”