Both mrs clinton and mr obama have the necessary attributes to take on mr mccain : they are two formidable campaigners who have offered detailed and generally intelligent policy proposals and have been forced to work exceptionally hard for their votes 克林顿夫人和奥巴马先生都有各自的杀手锏来对付麦凯恩先生:他们两人实力雄厚,施政纲领具体且颇为英明,而且他们迫于形势的压力不得不更加卖力,以争取选民的支持。