If you elect a fear mongering racist to the presidency people might be forgiven thinking its official policy, and when they are able to effect policy directly, its the state.

https://www.aclu-wa.org/pages/timeline-muslim-ban - the USA's official policy was banning Syrian refugees

"Without looking at the various polling data," Trump said in a statement, "it is obvious to anybody the hatred is beyond comprehension. Where this hatred comes from and why we will have to determine. Until we are able to determine and understand this problem and the dangerous threat it poses, our country cannot be the victims of horrendous attacks by people that believe only in Jihad, and have no sense of reason or respect for human life."

This was in reference to a woman who was the wife of an accomplice from Pakistan.