NPR News

Americans elected Barack Obama to a second term Tuesday, with the president capturing or on the verge of winning all of the key states that had been at the center of his hard-fought campaign against Republican Mitt Romney.

"Whether I earned your vote or not, I have listened to you," Obama said early Wednesday at a speech before thousands of supporters in Chicago. "I have learned from you. And you've made me a better president.

Republicans have easily maintained their hold on the House, while missteps from Tea Party favorites helped Democrats retain a majority in the Senate.

That means the two chambers of Congress remain deeply divided, with prospects for agreement on such big-ticket items as deficits, tax rates and climate change unclear.