Mr.Huntsman warned the other candidates against what he called the toxic nature of some of their campaigning against Mr.Romney.如果第一个against是警告不要,第二个是修饰campaigning。what后面指的是这种行为,那么不是该有个词是the other candudates”” 使用““what后面的行为来反对吗?而且what后面是表示行为的话,那不是也应该有个介词来表示对象是mr,romney?