Lou Dobbs is an ass. I can say that because he’s 1) a public figure 2) engaged in political speech and 3) such expression has the greatest protection in this country. Oh - and truth’s a defense against a claim of defamation. The last few days Lou and his pals at Fox have backtracked claims they made about two corporations - I won’t name them - involved in voting machines and software. Rudy Guilia…