Mexico has been assisting and helping illegal immigrants to illegally get into the United States. Mexico needs to stop helping illegal immigrants get into Mexico. Mexico refuses to stop them, instead passing them, illegally, into America. . Mexico, unofficially of course but actually for real refuses to help America while holding-up America by supplying parts and goods to America instead of stopping illegal immigrants. Trump doesn’t want to impose tarriffs and more cost onto Americans but he needs a way to get Mexico to do what it should have been doing.