A new report by the independent research institute Center for Immigration Studies is one of the first to estimate the effect of illegal immigration on the federal budget. (most previous research was on the effect ot state and local gov.) The full text of the report is embargoed until Aug. 25. The short summary of their pending study released today states that the costs that illegals impose on the federal budget are much larger than the payroll tax payments they contribute and that they run into the billions of dollars. "The study also finds that if illegals were given amnesty,...