So she's going to fire Mexico and replace them with -- who?
If the idea is that it's the leaky border that makes for drug problems and we need to replace the politicians who made or left the border porous -- fine.
But the who do we blame -- Mexico or the US? -- angle isn't worth much.
Might be worth an opium war. The policy problem you point at is one the U.S. has avoided (because of the influence of corrupt, drug-involved plutocrats and power-brokers Stateside), that can be crystallized as, "what do you do, when your neighboring state is run by narcoterrorists, people of ontological ugliness and ferocity?"
Mexico is to blame for the surge in heroin. Two different systems from Mexico bring in the drugs and create new users: the cartels selling brown heroin and the Nayarit, Mexico group pushing the horrific black tar heroin. Those from Nayarit are far more dangerous, have expanded to at least 17 states, recruit, including among children, in communities with no previous heroin problems.
One odd trait among the black tar heroin pushers is that they are under orders to sell only to whites, never to non-whites.