The U.S. Supreme Court appeared ready on April 25 to support at least part of Arizona’s controversial immigration law, in spite of pleas by the Obama administration to keep the federal government as the predominant force in setting immigration policy.

The politically charged case of Arizona v. U.S. drew crowds and interest both inside and outside the Court, rivaling last month’s landmark arguments in the Affordable Care Act cases. After the April 25 arguments were over, shouting protesters in front of the Court forced the media stakeout into retreat onto the Court’s marble plaza when Arizona Governor Jan Brewer, a supporter of the law, was about to address reporters.