Trump believes that there's no other choice but to allow cops to profile people. Which means if you black and you are driving a nice car or you just happen to be in a nice neighborhood the police have the right to stop you because you fit a certain profile or because they feel your kind shouldn't be in a certain area or driving a certain car.
I guess in trumps world the police have a right to follow me and question me because they want to assume I am connected with the maffia.
Since some of you want to uphold the constitution - trump is supporting something that obviously infringes on every legal American rights.