Mr Giuliani is too liberal, Mr Romney is too much of a flip-flopper, Mr McCain is too independent-minded, particularly on stem-cell research and a constitutional amendment to ban gay marriage.

• 朱利安尼显然是个标准的自由派，罗姆尼则经常出尔反尔，而麦凯恩的看法，尤其在对于干细胞研究以及禁止同性恋婚姻的宪法修正案方面，又表现得太过卓尔不群。