The mantra “America first!” only pushes our allies away. And the United States is not an island. We are interdependent on our allies. And when the president continually says that Mexico is the only country where illegal immigrants come from, and that they should pay for a pointless border wall, it says that he is willing to cut ties even with longtime allies. The best ways to enforce our relationship with Mexico is to hold the president accountable for his hate speech against Mexicans.