Trump is out to STOP them. I’m interested in how, potentially, such a promise would be accomplished.
Applying the same types of pressure to Mexico as he did with the last 'Caravan'. SD BP sector does about 40,000+ apprehensions every month. 10k is chicken. Mexicoc can break this up as soon as they want to, the Prez needs to make them 'want' to.
Close border to legal traffic both ways, prohibit remittances to the countries involved. Blockade Mexico's ports would be an enhanced step, ie no trade out or North. Cancel the Mexican part of the USMCA. It really isn't that hard, just that no one has ever done anything to stop it.