With Monday's deadline for re-enrollment in Obamacare health plans looming, insurers are preparing for the possibility that million of customers could change plans, the Wall Street Journal reported. Making things difficult, too, is the need to plan for the opposite--for customers who opt not to change plans by 11:59 p.m. Pacific time on Dec. 15 and will automatically re-enroll in the insurance plan they already have. Cigna, for example, said it will need "every day, every hour, every minute" between Dec. 15 and Jan. 1 to make sure enrollees' plans are activated and bills are accurate. Article