Apr 12, 2014 12:19 Sebelius resigning from top HHS post Sebelius resigning from top HHS post Health and Human Services Secretary Kathleen Sebelius listens on Capitol Hill in Washington, Thursday, April 10, 2014, during the Senate Finance Committee hearing on the HHS Department's fiscal Year 2015 budget. Sebelius said 7.5 million Americans have now signed up for health coverage under President Barack Obama's health care law. That's a 400,000 increase from the 7.1 million that Obama announced last week at the end of the law's open enrollment period. The figure exceeded expectations, a surprise election-year success for the law after a disastrous roll-out. (AP Photo/Susan Walsh) JULIE PACE| AP White House Correspondent April 12, 2014 Comments WASHINGTON (AP) — Health and Human Services Secretary Kathleen Sebelius is resigning from the Obama administration after the rocky rollout of President Barack Obama’s signature health care law, a White House official said Thursday. Her resignation comes just one week after the end of the first enrollment period for the Obamacare law. While the opening weeks of the rollout were marred by website woes, the administration rebounded strongly by enrolling more than 7 million people in the new insurance marketplaces. Sebelius’ resignation following her five-year tenure in Obama’s Cabinet comes as the White House seeks to rebound from the politically damaging launch of the health care law. But it could also set the stage for a contentious election-year confirmation hearing to replace her, as Republicans seek to make the health law the centerpiece of their efforts to retake the Senate in the November midterm contests. The official said Obama was nominating Sylvia Mathews Burwell, the director of the Office of Management and Budget, to replace Sebelius. The official was not authorized to discuss Sebelius’ resignation ahead of the formal announcement and requested anonymity.