Originally Posted by mineistaken

Why not? Only his rhetoric sends the message "you are not welcome here" and it is natural that only this one would attribute to decrease.
Then there were some changes to ICE, border patrol guidelines, maybe staff numbers and so on. Which also contributes.

This is common sense. Not saying that all 47% is due to Trump, but trying to deny that at least part of it is due to Trump is pretty ignorant and against common sense.