That's an excellent point, he could introduce legislation to deal with unwarranted police shootings of young black people. And I think he should, not only is it the right thing to do, but the visuals would help him build credibility. But he can't do it now because the Senate is not in session.

The president on the other hand, isn't bound by a senatorial calendar. He can issue executive orders, request DOJ investigations of all suspicious deaths in police custody, and make use of the bully pulpit to keep public attention focused on the issue. He's a very persuasive man when he wants to be, but for some reason, he's been more or less absent on this issue.