Not sure if stopping imports would be a solution. It cuts both ways.
https://www.inside-mexico.com/what-does-mexico-export-to-the-us/
Mexico is currently our 3rd largest goods trading partner with
$531 billion in total (two way) goods trade during 2015. Goods
exports totaled $236 billion; goods imports totaled $295 billion.
The U.S. goods trade deficit with Mexico was $58 billion in 2015.
They need us more than we need them...their economy is not good right now...use the leverage we have...pressure banks to end illegal remittances, also works.