Kansas Gov. Kathleen Sebelius has never lost an election, something analysts attribute to cool competence, a lifelong education in politics, and a knack for reaching across the political divide. But Sebelius has been mostly frustrated in her attempts to expand healthcare coverage in Kansas. President Obama is scheduled to formally introduce her at a White House ceremony as his nominee for secretary of health and human services, putting Sebelius in the midst of the growing debate over revamping the nation's healthcare system.