(FILES): This file photo dated December 18, 2011 shows the US Capitol in Washington, DC, as US President Barack Obama faced a new congressional gridlock over a payroll tax cut after he signed into law a USD 1 trillion spending bill, averting a government shutdown. On September 23, 2013 the White House warned US federal agencies to prepare for a possible government shutdown that could hobble the US economy, as Congress wrangled over a budget deadline. The current fiscal year ends on September 30, and Congress remains bitterly split over spending, and in particular over President Barack Obama's landmark health care law. AFP PHOTO / Karen BLEIER / FilesKAREN BLEIER/AFP/Getty Images