Patrick Buchanan, the conservative commentator whose Republican primary challenge and divisive convention speech weakened the first President Bush's campaign for re-election in 1992, is publishing a book excoriating the second President Bush over the invasion of Iraq, just in time to grab a share of the limelight at another Republican convention. In Where the Right Went Wrong, released late last week, Buchanan calls the invasion of Iraq "the greatest strategic blunder in 40 years, a mistake more costly than Vietnam. If prudence is the mark of a conservative, Mr. Bush has ceased to be a conservative," Buchanan wrote. The release...