Officials said Ms. Sebelius, 65, made the decision to resign and was not forced out. But the frustration at the White House over her performance had become increasingly clear, as administration aides worried that the crippling problems at HealthCare.gov, the website set up to enroll Americans in insurance exchanges, would result in lasting damage to the president’s legacy.
The resignation is a low point in what had been a remarkable career for Ms. Sebelius, who as governor of Kansas was named by Time magazine as one of the five best governors in the country and was even mentioned as a possible running mate for Mr. Obama in 2008. The two had bonded when Ms. Sebelius endorsed his presidential bid early in 2008, becoming one of the highest-profile Democratic women to back him over Hillary Rodham Clinton, and helping him deliver a big win in the Kansas caucus.
She testified just today at a budget hearing for Health and Human Services.
Not surprisingly, the twitterverse is having fun with the news