The President of United States and any Government Officials stop public statement before investigation is completed.

The President jumped into conclusion of race played a role quickly for the recent tragedy of Philando Castile shot by Police. So was Minnesota Governor Mark Dayton.
There is only victim's video showing facts after the shooting so far, investigation by local and Federal agency is still underway. No Government Officials should ever make statement like that to divide the gaps among races.
Donald Trump talks and claims a lot, because he's still a candidate. But the elected Government Officials must wait for all the facts found and investigators completed their works.