President Barack Obama took a risk by deciding to include changes to Medicare and Social Security in his 2014 fiscal year budget. And, as with all true gambles, political or otherwise, it comes with an uncertain fate.

Senators face a major test this week on whether to enact stricter gun control measures, and the interest groups with a stake in the issue aren't letting up. At the same time, families of gun violence victims will be in the Capitol to make their voices heard.

Lawmakers in Congress and at the state level are grappling with how to approach and pass new gun legislation. For the latest from Capitol Hill and state capitals, Gwen Ifill talks with Ed O'Keefe of The Washington Post, Arkansas State Rep. Charles Collins and Vinny DeMarco, president of Marylanders to Prevent Gun Violence.

In his new book "The End Of Big: How The Internet Makes David The New Goliath," author Nicco Mele examines democracy taking place outside our existing structures of power, government and big business. Mele argues that such a shift makes us "reimagine" society as we know it, and helps return power to the little guy.

As the legality of same-sex marriage is debated, so is terminology.

NPR's Ron Elving and Ken Rudin bring you the latest political roundup.

DOMA bars same-sex couples married under state law from receiving federal recognition.

The justices debated an essential question: Should the case be in the Supreme Court at all?