HOUSTON (AP) — Texas cities are ramping up efforts to get people enrolled in President Barack Obama’s health care exchange as they face a deadline for insurance coverage to begin Jan. 1. People who want their plans to begin Jan. 1 have to enroll by Monday. Open enrollment continues through March 31. Texas has the highest rate of uninsured in the country. Dallas County Judge Clay Jenkins says most of the 425 workers trained to assist people with enrollment are working, and if necessary some will be called in from a day off to further assist. Jenkins says dozens of enrollment events have been held in recent days. U.S. Secretary of Health and Human Services Kathleen Sebelius visited Houston and Dallas on Friday. About 14,000 Texans enrolled for coverage in October and November.