The Note's Must-Reads are a round-up of today's political headlines and stories from ABC News and the top U.S. newspapers. Posted Monday through Friday right here at www.abcnews.com

Compiled by ABC News' Jayce Henderson, Amanda VanAllen and JP Lawrence

NSA: ABC News' Matthew Mosk, James Gordon Meek and Lee Ferran: " Edward Snowden, NSA Contractor, Claims to be Source of Surveillance Program Leaks" The source of a series of top secret leaks from the National Security Agency has stepped out of the shadows and identified himself as ex-CIA technical assistant Edward Snowden, saying he was standing up against the U.S. government's "horrifying" surveillance capabilities. "I do not want to live in a world where everything I do and say is recorded," the 29-year-old told the British newspaper The Guardian, which broke the first in a series of headline-grabbing articles on NSA surveillance late last week. "That is not something I am willing to support or live under." LINK

The Washington Times' David Sherfinski: " Heads of Congress' intelligence committees defend NSA surveillance" The chairmen of the House and Senate intelligence committees on Sunday defended a recently disclosed government surveillance program as the whistleblower behind the bombshell leak about the program willingly revealed himself to the public and spoke proudly of his actions. Rep. Mike Rogers, Michigan Republican, lamented criticism and said the "inflammatory nature of the comments" from people he says are not familiar with National Security Agency surveillance programs do not fit with what the programs do. LINK

The New York Daily News' Mark Mazzetti: " Ex-Worker at C.I.A. Says He Leaked Data on Surveillance" A 29-year-old former C.I.A. computer technician went public on Sunday as the source behind the daily drumbeat of disclosures about the nation's surveillance programs, saying he took the extraordinary step because "the public needs to decide whether these programs and policies are right or wrong." During a 12-minute video interview that went online Sunday, Edward Joseph Snowden calmly answered questions about his journey from being a well-compensated government contractor with nearly unlimited access to America's intelligence secrets to being holed up in a Hong Kong hotel room, the subject of a United States investigation, with the understanding that he could spend the rest of his life in jail. LINK

The Washington Post's Barton Gellman, Aaron Blake and Greg Miller: " Edward Snowden comes forward as source of NSA leaks" A 29-year-old man who says he is a former undercover CIA employee said Sunday that he was the principal source of recent disclosures about ­top-secret National Security Agency programs, exposing himself to possible prosecution in an acknowledgment that had little if any precedent in the long history of U.S. intelligence leaks. Edward Snowden, a tech specialist who has contracted for the NSA and works for the consulting firm Booz Allen Hamilton, unmasked himself as a source after a string of stories in The Washington Post and the Guardian that detailed previously unknown U.S. surveillance programs. LINK

SUPREME COURT: The Hill's Sam Baker: " Decision on gay marriage highlights Supreme Court's summer term" Both sides in the fight over same-sex marriage are bracing for a decision from the Supreme Court, the most high-profile of the cases justices are expected to rule on this summer. Where last year brought an anxious waiting game in immediate, politically charged cases over ObamaCare and immigration, this year's major rulings will center around broad questions of civil rights. LINK

USA Today's Richard Wolf: " Gay marriage rulings: Experts predict what court will do." As the Supreme Court prepares to issue two historic decisions on gay marriage this month, however, the judges and lawyers who worked on both sides of those earlier cases don't expect anything quite so eloquent or all-encompassing from a cautious and conservative court. The consensus view: The justices will limit the expansion of gay marriage rights to California, with few if any implications for the rest of the country. Only on the Defense of Marriage Act, most agree, will the court strike a broad blow against discrimination by striking down the ban on federal benefits for married same-sex couples. LINK

IMMIGRATION: The Los Angeles Times' Katherine Skiba: " Senate Republican says she'll back immigration bill" Conservative Republican Sen. Kelly Ayotte announced her support Sunday for the Senate's bipartisan immigration overhaul, lending momentum to the comprehensive measure. "Our immigration system is completely broken," the New Hampshire lawmaker said on CBS' "Face the Nation." "This is a thoughtful, bipartisan solution to a tough problem." Ayotte, who was elected in 2010, is the first Republican to endorse the measure apart from the four in the Senate's so-called Gang of Eight who crafted the bill: Sens. John McCain of Arizona, Lindsey Graham of South Carolina, Marco Rubio of Florida and Jeff Flake of Arizona. LINK

Politico's Seung Min Kim and Jake Sherman: " John Boehner begins to sketch immigration plan" Speaker John Boehner has been stunningly silent about his plans to move immigration reform through the House. But privately, the Ohio Republican is beginning to sketch out a road map to try to pass some version of an overhaul in his chamber - a welcome sign for proponents of immigration reform. LINK

CONGRESS: The Wall Street Journal's Corey Boyles: " Congress Heads for Showdown Over Food-Stamp Funding." A major farm bill that the Senate is likely to approve on Monday will set up a collision with the House over funding for the fast-growing food-stamp programs. The cost of the food-stamp programs has risen substantially since President Barack Obama took office in 2009 amid the worst economic downturn in 80 years, jumping 41% to $75.7 billion in 2011. The House is on track to cut $20 billion from the program over the next decade, or less than 3%. The bill the Senate is expected to pass Monday would cut food stamps by $4 billion over a decade. LINK

GUANTANAMO: ABC News' Alexandra Dukakis and Matthew Larotonda: " McCain, Feinstein and Obama Chief of Staff on Surprise Trip to Guantanamo Bay." Senators John McCain, R-Ariz., and Dianne Feinstein, D-Calif., traveled to the federal detention facility at Guantanamo Bay, Cuba, Friday with White House Chief of Staff Denis McDonough. The trip came amid a mass hunger strike of more than one hundred prisoners at the most recognizable and controversial holding facility in the war on terrorism. President Obama had promised to close Guantanamo when he was running for president in 2008, but progress has long since stalled. LINK

HEALTH CARE: The Boston Globe's Tracy Jan: " State may fill gap in federal health care coverage." A congressional mistake that could cause nearly 4 million people to be ineligible for federal subsidies in President Obama's health care law has prompted Massachusetts officials to launch a new effort to try to close the gap. Under what has become known as a "glitch" in Obama's health plan, eligibility for insurance subsidies will be based on how much it costs workers who buy an individual plan, not the far more expensive family plan. The glitch would affect uninsured spouses and an estimated 460,000 children of workers who cannot afford the family coverage offered through employers. LINK

ABC NEWS VIDEO: " Obama on NSA Controversy: 'No One Is Listening To Your Phone Calls'" LINK

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