Years ago, Noriega said that Panama was in a “state of war” with the United States. The U.S. said ok, and invaded and put him in prison. Mexico and the Central Americans are smart enough not to say they are in a “state of war.”
The Mexicans may be silent ... but the state of war remains.
Bam-Bam has the resources, as POTUS, to resolve this problem. He clearly does not WANT to resolve it.