• A City of Corinth police car prevents access to a house in the West Hills Subdivision in Corinth, Miss. on Thursday morning, April 18, 2013. Law enforcement officials were blocking off the dwelling after taking Paul Kevin Curtis of Corinth, Mississippi into custody Wednesday under the suspicion of sending letters covered in ricin to U.S. President Barack Obama and Mississippi Sen. Roger Wicker (R-MS). Curtis was arrested at his home in Corinth, Mississippi, and is "believed to be responsible for the mailing

    Paul Kevin Curtis was arrested at his home in Corinth, near the Tennessee state line though it was not immediately known what charges he faced.

    LAST UPDATE : Apr 18, 2013, 5:08 PM EDT
  • Thrust into new role as gun control lobbyists, undaunted by the initial rejection of expanded background checks for most gun purchases.

    LAST UPDATE : Apr 17, 2013, 11:08 PM EDT
  • Former Arizona Rep. Gabrielle Giffords listens as her husband, retired astronaut Mark Kelly speaks on Capitol Hill, in Washington, Tuesday, April 16, 2013, during a ceremony to honor Gabriel "Gabe" Zimmerman.

    Bipartisan plan would beef up the screening process for most gun purchases in the wake of the killing of 26 students and aides at a school in December.

    LAST UPDATE : Apr 16, 2013, 8:28 PM EDT
  • In this March 12, 2013 file photo, Sen. Marco Rubio, R-Fla., speaks on Capitol Hill in Washington. Rubio says a proposed immigration bill expected to be introduced this week won't offer amnesty to those who entered the U.S. illegally.

    Conservatives see amnesty for criminals and liberals harsh punishments on a demographic group that favors Democrats in national elections.

    LAST UPDATE : Apr 16, 2013, 5:54 PM EDT
  • In this Wednesday, Dec. 5, 2012 file photo, Senate Appropriations Subcommittee on Department of Homeland Security Chairman Sen. Mary Landrieu, D-La., speaks to witnesses, during a hearing, to examine Hurricane Sandy, in Washington.

    Backing the president's push for tough new gun control laws could imperil lawmakers in his party up for re-election next year.

    LAST UPDATE : Apr 12, 2013, 10:30 PM EDT
  • Ajna, 28, of Washington, an artist who goes by only her first name and is of Ethiopian and Eritrean descent, poses for a portrait at the end of the "Rally for Citizenship" on Capitol Hill in Washington on Wednesday, April 10, 2013. (AP Photo/Jacquelyn Martin)(AP Photo/Jacquelyn Martin)

    The bipartisan bill would bar anyone who arrived in the U.S. after Dec. 31, 2011, from applying for legal status and ultimately citizenship.

    LAST UPDATE : Apr 12, 2013, 12:28 PM EDT
  • Treasury Secretary Jack Lew arrives on Capitol Hill in Washington, Thursday, April 11, 2013, to testify before the House Ways and Means Committee to defend President Barack Obama's budget proposal for fiscal 2014.

    Treasury Secretary insists Obama administration is optimistic about congressional negotiations despite bipartisan attacks on the proposal.

    LAST UPDATE : Apr 11, 2013, 5:37 PM EDT