Lawmakers say President Obama's overhaul of the nation's healthcare system is unlikely to be completed by the White House's August deadline. Democrats and Republicans said the administration's healthcare reform proposals are moving forward on Capitol Hill, but they cautioned against rushing into a spending plan that could cost trillions of dollars over the next decade. Health and Human Services Secretary Kathleen Sebelius, however, said she remains optimistic about Congress sending the legislation to the White House before the year ends.