(CNSNews.com) - Almost 23 million American households are about to have their federal taxes raised by an average of $3,900 this year, but they may not know it yet. They could get a big surprise when they prepare their tax returns next year. Among those subject to this already-in-place tax increase are some families making less than $50,000 per year, and virtually all married couples earning between $100,000 and $500,000 a year, according to data published by the Congressional Budget Office. The looming tax hike is contrary to President Barack Obama's repeated promise not to increase taxes on any individual...