30-plus governors told to quit in letters from Guardians of the Free Republics

The Washington Post reports:

More than 30 governors, including Robert F. McDonnell (R) of Virginia, received letters from an anti-government group this week demanding that they resign within three days or face removal from office.

The letters from the group, Guardians of the Free Republics, do not threaten violence, according to officials in Richmond and Washington. No arrests have been made.