NASHVILLE, Tenn. (AP) — A coalition supporting Republican Gov. Bill Haslam's proposal to extend health coverage to 280,000 low-income Tennesseans is planning a rally at the state Capitol on Monday.The group is comprised of clergy, students and community groups.Haslam's original Insure Tennessee proposal failed in a special legislative session last month, but has been revived by a Democratic lawmaker in the Senate.The resolution sponsored by freshman Sen.