Republican New Jersey Gov. Chris Christie speaks with reporters in Trenton, N.J., this month. Christie was not invited to this year's CPAC conference. Mel Evans/AP hide caption

itoggle caption Mel Evans/AP

Under sequestration, federal agencies don't have the flexibility to choose to spare popular programs or services by making administrative cuts elsewhere. Tatiana Popova /iStockphoto.com hide caption

itoggle caption Tatiana Popova /iStockphoto.com

Rep. Adam Kinzinger, R-Ill., is among those Republicans the conservative Club for Growth is looking to "primary" in 2014. Susan Walsh/AP hide caption

itoggle caption Susan Walsh/AP

Children eat breakfast at a federally funded Head Start program. Many Head Start administrators are concerned they may have to cut back on the number of enrolled children if the sequester moves ahead. John Moore/Getty Images hide caption

itoggle caption John Moore/Getty Images

New York City Mayor Michael Bloomberg speaks to the media outside the White House after meeting with Vice President Joe Biden on Wednesday to discuss the administration's proposals to reduce gun violence. Drew Angerer/Getty Images hide caption

itoggle caption Drew Angerer/Getty Images

President Obama speaks Tuesday about the sequester in Newport News, Va. Steve Helber/AP hide caption

itoggle caption Steve Helber/AP

Shipyard workers wait for President Obama to speak about looming automatic federal budget cuts Tuesday in Newport News, Va. Charles Dharapak/AP hide caption

itoggle caption Charles Dharapak/AP

New York City Mayor Michael Bloomberg's gun control superPAC has poured more than $2 million into a Democratic primary in Chicago for a U.S. House seat. Brendan McDermid/Reuters/Landov hide caption

itoggle caption Brendan McDermid/Reuters/Landov