From the Washington Post LiveChat, now:

Arlington, Va.: Is this indicative of a larger problem? It seems like far right wing violence is occurring fairly often lately, or is that just the media making it bigger than it is?

Heidi Beirich: This is not a media phenomenon. We have had two incidents involving cop killings by anti-government extremists, two white supremacist plots against the president and a guy in Maine was actually found, after his wife shot him, to have had the components of a dirty bomb in his home, according to the FBI. There was also a racist rampage by Keith Luke in Massachusetts that involved rape and murder of African immigrants. So these are real things that are sadly occurring.