As the granddaddy of political demagoguery, President Obama might have outdone himself with his recent admonition to political opponents not to “demagogue” the immigration issue.

A “demagogue” is “a political leader who seeks support by appealing to popular desires and prejudices rather than by using rational argument.” “Ah,” you say, “Obama is onto something here. Those who oppose his open-border policy are appealing to prejudice against immigrants instead of to rational argument.” Wrong.