If People Are "Attacking Your Ethnicity" They Don't Want To Engage In Substantive Argument

So was it a Democrat or a Republican who just said “if people are…attacking your ethnicity…they don’t actually want to engage in the substantive merits of the argument.”?John Carlson recaps the origin of this brilliant political response and then proceeds to dismantle the feeble immigration reform argument of MSNBC pundit, “Toure”.