Dueling PACs gear up for GOP primary wars over immigration

Politico.com - For more and to sign up click here The GOP's escalating infighting over immigration now has a pair of PACs lining up millions of dollars on opposing sides of Republican primaries across the country. The dueling pledges turn a congressional fight over Rep. Maria Elvira Salazar's (R-Fla.) Dignity Act into an electoral proxy war between hardliners and moderates over how far the Republican Party should…