He is making a huge issue of birthright citizenship when he will never carry it out. Even Paul Ryan fell for the line, but, then Ryan would have no reason to understand at least three of Trump's own family and staff would fall under that Executive Order.
This is abuse of power. Trump is using the USA government as a political tool, that includes his movement of USA troops to the USA southern border.
Some in the Republican Party might even applaud Trump for his abusive political mannerisms to drive the vote, but, this is pure unadulterated corruption.