Conservatives Are Largest Ideological Group in US

From Gallup, "Conservatives Remain the Largest Ideological Group in U.S." by Lydia Saad:

Political ideology in the U.S. held steady in 2011, with 40% of Americans continuing to describe their views as conservative, 35% as moderate, and 21% as liberal. This marks the third straight year that conservatives have outnumbered moderates, after more than a decade in which moderates mainly tied or outnumbered conservatives.