  :If you're referring to the assertion that Evan Thomas is the grandson of Socialist Party presidential candidate Norman Thomas, this appears to be confirmed by Evan Thomas himself.  In the January 23rd, 2008 issue of Princeton Alumni Weekly, Evan Thomas published an article profiling his grandfather Norman Thomas, who was a Princeton alumnus.  http://paw.princeton.edu/issues/2008/01/23/pages/9475/index.xml  I presume that this is adequate sourcing, and will add it to the article.    