Trump's threat to cut off aid to Northern Triangle countries is flatly contradicted by recommendations for addressing the migrant crisis from *both* the State Department *and* his own Customs and Border Patrol chief:
washingtonpost.com/opinions/2018/…



This is foundational to Trump's delusional worldview.
Trump called Mexicans rapists *and* he claimed Mexico "sends" them to us.
That's why he vowed to make Mexico pay for the wall.
washingtonpost.com/opinions/2018/…

Thus, his failure to make Mexico pay for the wall isn't a small, tangential broken promise.
Trump's vow to do this was a pillar of his entire worldview.