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' Carrie Halperin, Amanda VanAllen, Jayce Henderson and Will Cantine

CLIMATE AND ENERGY

ABC News' Mary Bruce: " President Obama Outlines Plan to Combat Climate Change, Says Keystone Pipeline Must Not Increase Greenhouse Gases" President Obama today outlined his plan to combat climate change, calling for new standards to reduce carbon pollution and saying he would not approve the Keystone XL oil pipeline if it produces more greenhouse gas emissions."As a president, as a father and as an American, I am here to say we need to act," the president told a crowd of roughly 500 people at Georgetown University. LINK

The Hill's Ben German: " Obama offers Keystone surprise in climate change agenda speech" President Obama said Tuesday he will approve the Keystone XL pipeline only if it does not substantially increase greenhouse gas emissions - a surprise announcement ambiguous enough to leave both sides in the fight thinking they'd heard good news. Read more: LINK

TEXAS ABORTION FILIBUSTER The Los Angeles Times' Molly Hennessy-Fiske: " Texas filibuster: Senator launches marathon bid to halt abortion bill" N - The Texas state Senate is poised for passage of a sweeping new law that would ban abortions at 20 weeks and force the state's abortion clinics to upgrade or close - unless Sen. Wendy Davis and her pink sneakers can stand in the way. LINK

SCOTUS/VOTING RIGHTS ACT Politico's Josh Gerstein and Darren Samuelsohn: " Supreme Court Strikes Down key Voting Rights Provision" The Supreme Court Tuesday struck down a key part of the Voting Rights Act, ruling unconstitutional a provision of the landmark civil rights legislation used to promote the political power of minority voters across large swaths of the southern United States for nearly four decades. LINK

The Washington Post's Karen Tumulty and Dan Balz: " Supreme Court Decision On Voting Rights May Leave Law In Limbo" In calling for a rewrite of one of the nation's most significant civil rights laws, the Supreme Court has demanded that the other two branches of government design a guarantee of racial equality that reflects the realities of the 21st century. But the real question is whether the political system, broken and polarized as it is, still has the capacity to take on such a challenge. LINK

The New York Times' Jonathan Martin: " New Face Of South Rises As An Extra Legal Force" The Deep South was, quite literally, a black and white world in 1965, when Congress approved the Voting Rights Act, sweeping away barriers that kept African-Americans from the polls. And the Supreme Court decision on Tuesday, which struck down a key part of the law, is certain to set off a series of skirmishes over voting regulations between the white Republicans who control Southern state legislatures and civil rights groups seeking to maximize black voter clout. LINK

USA Today's Richard Wolf and Brad Heath: " Supreme Court rules on voting rights law: Now what?" The Supreme Court's decision Tuesday striking down a key section of the 1965 Voting Rights Act puts the nation's strongest remedy against voting discrimination on life support, virtually powerless to block actions by states and dependent on a deadlocked Congress. Chief Justice John Roberts' forceful criticism of the law's decades-old formula for choosing which states must clear voting changes with the federal government came with a warning that any new legislation "speaks to current conditions." LINK

The Wall Street Journal's Jess Bravin: " Court Upends Voting Rights Act" The Supreme Court nullified a core provision of the Voting Rights Act in an ideologically divided ruling that eroded a landmark of the civil-rights era and threw the issue into the lap of a gridlocked Congress. In a 5-4 decision, Chief Justice John Roberts said Jim-Crow era discrimination no longer justified requiring a group of mostly Southern states to seek Washington's approval before changing election practices. LINK

SENTATOR MARKEY Boston Globe's Michael Levenson, Frank Phillips and Martin Finucane: " Markey looks to build 'bold and bright future'" Veteran Democratic US Representative Edward J. Markey beat back a challenge from Republican businessman Gabriel E. Gomez today in a special election for US Senate in Massachusetts that was marked by its brevity and by low voter turnout. Markey garnered 55 percent of the votes, compared with 45 percent for Gomez, with 99 percent of precincts reporting late this evening. Markey, 66, and Gomez, 47, were vying to fill the seat that Democrat John F. Kerry left vacant when President Obama picked him to be US secretary of state in December. LINK

IMMIGRATION The Washington Times' David Sherfinski: " Rep. Paul Ryan: Senate action makes final passage on immigration 'even more likely'" Rep. Paul Ryan said that while the U.S. House of Representatives will chart its own course on immigration, Monday's vote in the Senate is a positive sign that something will pass in the end. "We're going to take our time," the Wisconsin Republican said on CBS's "This Morning." "The border-security triggers are very important. And so that's going to be probably the keystone of the House legislation, which is first you've got to secure the border." LINK

ABC NEWS VIDEOS " Harry Reid Slams House GOP 'Crazies'" LINK

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