Thursday, January 05, 2012 Bachmann off, Perry on Republican rollercoaster By Eric Johnson and Steve Holland DES MOINES, Iowa/MANCHESTER, New Hampshire (Reuters) - Michele Bachmann was out, Rick Perry was back and Rick Santorum was up in the most volatile Republican presidential nominating contest in decades on Wednesday, as conservative Republicans searched for an alternative to frontrunner Mitt Romney.............. An afterthought in the race until now, Santorum could have difficulty scaling up his campaign to compete in other states. On Wednesday, his website apparently crashed under a deluge of traffic. Santorum has escaped close scrutiny so far, but rivals have...