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 and Jayce Henderson

BOSTON BOMBING SUSPECT The New York Times' Charlie Savage: " G.O.P. Lawmakers Push to Have Boston Suspect Questioned as Enemy Combatant" Some Republican lawmakers want President Obama to declare the surviving Boston bombing suspect an enemy combatant in order to question him without a lawyer and other protections of the criminal justice system, intensifying a recurring debate over how to handle terrorism cases arising inside the United States. But while the suspect, Dzhokhar Tsarnaev, a naturalized American citizen, is a Muslim, there is no known evidence suggesting that he is part of Al Qaeda. The United States is engaged in an armed conflict with Al Qaeda, not all Muslim extremists. As a result, the dispute is pushing beyond familiar arguments and into new territory. LINK

The Hill's Mike Lillis: " Lawmakers question FBI handling of Boston terror attack suspect" A number of lawmakers are going after the FBI, questioning if the agency failed to notice red flags surrounding one of the Boston Marathon bombing suspects, Tamerlan Tsarnaev.The lawmakers are demanding answers on why the FBI declined to scrutinize Tsarnaev more closely, following a lengthy trip the alleged bomber took last year to Chechnya and Dagestan in Russia's volatile Caucasus region. LINK

Boston Globe's Wesley Lowery: " Marathon tragedy tempers campaigning" As the city embarks on the road to recovery from the horrific Boston Marathon bombings and the ensuing manhunt that left it partially paralyzed, the US Senate hopefuls in this month's special election primary are returning to the political battlefield. But all five candidates agree: campaigning in the primary's final 10 days will need to be delicate. Republican hopefuls Daniel P. Winslow, Michael J. Sullivan, and Gabriel Gomez will all attend events and canvass neighborhoods throughout the weekend. The two Democrats competing in the primary, Representatives Edward J. Markey and Stephen F. Lynch, both said they are still holding off and probably will not resume campaigning until Monday. LINK

IMMIGRATION Politico's Manu Raju: " Ted Cruz vs. Marco Rubio on immigration" Ted Cruz is at odds with Marco Rubio over immigration legislation. The two have much in common as first-term senators elected with the help of the tea party from states with large Latino populations. Both have Cuban roots and are considered rising GOP stars and prospective presidential rivals. But the pair is divided on immigration legislation - a key difference that could have significant ramifications for their party and political ambitions. The Texas freshman is sharply critical of the pathway to citizenship for the nation's 11 million undocumented immigrants, a central part of the bipartisan bill that Rubio helped write. Cruz is weighing whether to aggressively oppose the immigration overhaul, a decision that could neutralize Rubio's outreach to conservative activists in order to minimize their opposition. LINK

POLITICS THIS WEEK ABC News' Rick Klein: " Guns, Immigration, Airport Lines: 5 Things You'll Care About in Politics This Week" It's trite to say a major crisis or tragedy changed everything. But the Boston Marathon bombing occurred smack in the middle of an extraordinarily active political season. Some big initiatives suffered setbacks in its wake, and a few new ones - welcome back, national-security politics, and we can't wait to learn how Chechnya matters to us now - are suddenly urgent. Here's some of what the ABC News political unit will be tracking this week. LINK

BOOKMARKS The Note: LINK The Must-Reads Online: LINK Top Line Webcast (12noon EST M-F): LINK ABC News Politics: LINK George's Bottom Line (George Stephanopoulos): LINK Follow ABC News on Twitter: LINK ABC News Mobile: LINK ABC News app on your iPhone/iPod Touch/iPad: LINK