Rand Paul nailed it and is the only politician to come anywhere near that level. That should tell you how likely it is that we will ever see national legislation that changes the police militarization in a meaningful way... unless citizens and their officials decide to change. Watching Rand Paul come out *way* left of the democrats AND with a workable plan of attack seriously has me changing my views on him though.
That said, I'm glad a large portion of the country is actually starting to talk about this problem that is heavily rooted in the War on Drugs and War on Terror. It's kind of surreal to hear everyone saying shit that Ice-T was saying in the early 90's. I could go on and on about how much we need to change things, but most of it was already covered above.
As for the topic of the Mike Brown killing, I really think people need to let it go to court. Brown's judge, jury, and executioner was a cop... and that is FUCKED UP. You don't respond to a complete lack of integrity like this with more of it. The idiots trying to scrape together every bit of "evidence" and "testimony" in an attempt to lay guilt on one party of the other are just absurd.