Advocates demanding stricter rules against illegal immigration -- including those backing Arizona's new law clamping down on undocumented immigrants -- have long argued that state lawmakers have been forced to act because of Congress's reluctance to take the lead.
But with little sign that Congress will act on comprehensive immigration reform this year, advocates for immigrants are also taking matters into their own hands. Like their political opponents, they have turned to their state legislatures to fight back.
In states from Pennsylvania to Utah, a battle of bills has been taking place between those who want to reproduce the Arizona law, which hands police more power to detain anyone they suspect of being in the country illegally, and those who want to extend further rights to immigrants.