A mythology about the relationship between American government and the news business is again making the rounds, and it needs a corrective jolt. The myth is that the commercial press in this country stands wholly independent of governmental sustenance. Here's the jolt: There's never been a time in U.S. history when government dollars weren't propping up the news business. This year, federal, state and local governments will spend well over $1 billion to support commercial news publishers through tax breaks, postal subsidies and the printing of public notices…….