The Trump administration and the president of El Salvador said Monday that they'd struck a deal allowing the U.S. to ship both detained migrants and imprisoned citizens to the tiny Central American nation,

Salvadoran President Nayib Bukele offered to let Trump move immigrants who are imprisoned in the U.S. to his notorious detention centers in El Salvador.

President Bukele, who labels himself as the "coolest dictator" and a "philosopher king," has built election success and immense popularity on an extreme security policy to combat gang violence in El Salvador, incarcerating large quantities of alleged gang members and securing a massive drop in homicides.