(CNN) -- The National Tea Party Federation, an organization that represents the Tea Party political movement around the country, has expelled conservative commentator Mark Williams and his Tea Party Express because of an inflammatory blog post he wrote, federation spokesman David Webb said Sunday.
"We, in the last 24 hours, have expelled Tea Party Express and Mark Williams from the National Tea Party Federation because of the letter that he wrote," Webb said of the blog post by Williams that satirized a fictional letter from what he called "Colored People" to President Abraham Lincoln.
Abigail Thernstrom, a commission member and a senior fellow at the conservative Manhattan Institute, called it "small potatoes" and said conservatives should pursue more important issues against the Obama administration. The case, she pointed out, invokes a narrow and rarely used provision of the 1965 Voting Rights Act, which has been used successfully to prosecute only three times since its passage.
"If you want to criticize [Attorney General] Eric Holder, there are lots of grounds on which to criticize him," she said. "Why waste your breath on this one?"