It is not the money that worries Americans so much as the fear that the cause is hopeless 这是原句子.
It is((not the money) )that worries Americans so much as the fear [does] ((that the case is hopeless))
"it is.that" 这儿是一个强调句型
"not ...so +原级+ as " 是比较级的否定式
that.为定语从句修饰the fear.
主语部分 not the money 谓语worries .
Money doesn't worry Americans so much as the fear does/worries Americans .