The shooters are crazy. Lost souls. The shooters are not representatives of the political left or right. The shooters are detached.
Neither the political right or left supports violence. That much we know.
But, to the crazy shooters, the political lines of demarcation are perceived as combat marching orders --- a chance for greatness on the imaginary battlefield.
Trump's daily rhetoric is all about divide, divide, divide. Russia's cyber ops do the same.
Leadership requires something different than what this President delivers.