The Beltway is buzzing over President Obama's likely nomination of Thomas E. Perez as the next head of the U.S. Department of Labor. But when Americans find out whom Perez has lobbied for most aggressively over the course of his extremist leftwing social justice career, they'll be wondering which country Obama's pick really plans to serve. Press accounts describe Perez, currently the assistant attorney general for the Justice Department's civil rights division, as a "tireless advocate of worker and civil rights." The son of immigrants from the Dominican Republic, Perez was a former special counsel for the late illegal...