Mexico can’t end the migrant flow by itself. But it can—and likely will—raise tariffs that target swing states.

Korea didn’t stop the won from appreciating through 1090 (its intervention level in 2016); Taiwan seems to be blocking any move through 30.

Former Nigerian vice-president Atiku Abubakar (R) and presidential aspirant leaves the podium after addressing delegates during the primaries of the ruling People's Democratic Party in the federal ca…