PHOENIX | Before there was Scott Walker, Rick Scott, Nathan Dealor Nikki Haley, there was Arizona’s Jan Brewer — the original Republican protest governor, going toe-to-toe with the Obama administration over immigration, fighting the White House in the courtroom and becoming an early symbol of states’ frustration with the White House. Now five months into her first elected term, Arizona’s top politician is once again challenging President Obama. This time, she is asking him not only to keep the National Guard on the border past its scheduled departure in June, but to boost its numbers to provide more security. “I...