The most conservative member of the U.S. Senate is from Idaho, according to the National Journal.
The news organization has Republican Jim Risch at the top of its list after analyzing all the roll call votes during the second session of the 112th U.S. Congress.
Idaho's other senator, Republican Mike Crapo, was also on the list.
Other notables include Mike Lee and Orrin Hatch, both of Utah, and Mike Enzi of Wyoming.
You can find the full list at http://goo.gl/Dd3q3.