Two key Republican lawmakers on Sunday called on Health and Human Services Secretary Kathleen Sebelius to testify before a congressional committee about recent problems with the roll-out of the health-care exchanges required under President Obama's signature health law. But they stopped short of saying she should resign immediately over the troubles. Sebelius has declined to appear this week in front of a House committee investigating issues with the federal Web site for the exchange, although she plans to attend a gala in Boston the night before.
