Dial down the deafening Sarah Palin buzz for just a moment: The most consequential decision in the 2012 Republican presidential sweepstakes could be whether Mike Huckabee decides to run again – and associates say the former Arkansas governor may well take the plunge. If Huckabee gets in, he will unquestionably be a force to be reckoned with in the fight for the nomination. He’d be the undisputed frontrunner in lead-off Iowa, where he won by nine points in 2008. He’d be the candidate to beat in South Carolina, which he narrowly lost to John McCain two years ago in part...