Protesters gathering in Chicago for the NATO summit were gearing up for their largest demonstration Sunday, when thousands are expected to march from a downtown park to the lakeside convention center where President Barack Obama and dozens of other world leaders will meet.

Twenty-two states and the District of Columbia are backing Montana in its fight to prevent the U.S. Supreme Court's 2010 Citizens United decision from being used to strike down state laws restricting corporate campaign spending.

A blind Chinese legal activist who escaped house arrest, endured a nearly monthlong diplomatic tussle and a hurried daylong flight paused ever so briefly upon his arrival in New York City before taking up a familiar fight.

For Facebook founder and CEO Mark Zuckerberg, it was quite a week — from birthday, to IPO, to I DO.

Confronting an economic crisis that threatens them all, President Barack Obama and leaders of other world powers on Saturday declared that their governments must both spark growth and cut the debt that has crippled the European continent and put investors worldwide on edge.