Wikipedia:Articles for deletion/Atheist left
I think the sources above make it clear that at minimum there are conservative sources such as Sabia who are using it to mean a specific group and not just the intersection of atheists and leftists but even that is 
— User:JoshuaZ, 06:33, 13 November 2006 (UTC)
Stance: comment
Cited policy: WP:OR (Wikipedia:No original research)