Incorrect. I would have read about it in the same place I read about this incident, Washington Post Metro Section. It might be on B4 instead of B1, but it would still be there.

Conservative or liberal. Politics should be irrelevant. Road rage and bad behavior can happen anywhere.

However, the Heritage Foundation has a LONG history of taking an agressive approach to every confrontation. I've got friends who work there, and they admit it freely. It's their modus operandi. There are liberal organizations of a similar temperament. Organizations like this might attract people of a bullying nature.