As a result of anxiety over workplace raids and uncertainty over the future of illegal immigrants in the United States, the E-Verify system is soaring in popularity across the country, growing by 1,000 companies a week, The Boston Globe reported. The number of businesses in the E-Verify system has increased 10-fold since 2006. Leading the trend are Arizona and Mississippi, which have made the system mandatory for all employers, as well as 10 other states that require E-Verify for state agencies and contractors. But use of the system is also growing in states where it is optional, such as California, Texas and Massachusetts.