This guy, Jeremy Joseph Christian, has been taken into custody. He was an ex-convict, as proclaimed on this Facebook page. His political affiliations seem unclear, however, he seemed fond of Bernie Sanders. He also wished the death of Donald Trump and Hillary Clinton voters (references in google search).
He proclaims on his Facebook in a note to the world that he's a Nihilist, and also a misanthrope and wishes the destruction of humanity.
The mainstream Media, point the finger at Donald Trump as the creator of this monster and demand that he denounce this heinous act. A Facebook page by the name Dan Rather, wrote a heartfelt message to Donald Trump begging him to pay his respects to the Heroes that stoop up to the murderous monster.