HOUSTON — If Texas wants to tailor its own expansion of health care coverage through the Affordable Care Act, then it's now up to state leaders to reach out to the federal government to have a dialogue, Health and Human Services Secretary Kathleen Sebelius said Monday. During a visit to Houston promoting the implementation of the health care law with local leaders and community groups, Sebelius said the Obama Administration remains eager to have conversations with Texas about expanding health care coverage in the state. But, she said, key discussions about expanding Medicaid to provide health insurance to those who cannot afford it must first occur at the state level, not between Washington, D.C., and Texas.