WASHINGTON — President Barack Obama's planned meeting Thursday with Arizona Gov. Jan Brewer faces a protest from opponents of Arizona's new immigration law. Opponents say the law, which Brewer signed, is discriminatory and say Obama isn't doing enough on immigration reform. Brewer is to meet Obama at the White House, and opponents said they will hold a demonstration there to denounce the Republican governor, "the discriminatory Arizona law she signed" and "President Obama's halfhearted leadership on immigration reform." Supporters of an overhaul of U.S.