Congress is poised to pass legislation would renew and expand the popular State Children's Health Insurance Program to cover four million more children over a period of more than four years. The program, which now covers 6.7 million children, is set to expire March 31. The legislation passed the House by a 289-139 vote on Jan. 14, and the Senate Finance Committee by a 12-7 vote the next day. The Senate is considering it and will likely vote soon.