For months, now, there has been an effort to frame the Democratic front-runner not just as a bad candidate, but as a potential violent threat to the American public.
Coulter's column yesterday opens up a second level in the 'terrorist' frame by equating Sen. Obama with the violent tactics of the 1970s group The Weathermen.
By suggesting to voters that terrorists support Obama, McCain embraced the long-term effort by right-wing media to define Democrats as supporters of foreign terrorist groups.