He wants to show that he has the support from what he calls the silent majority of Americans.

请教老师：这里what使用正确吗？

我的意思是support只能来自于sb, 所以sb= what he calls the silent majority of Americans. ？

he calls the silent majority of Americans “what”.  what是call的宾语补足语吧？

麻烦老师分析看一下，谢谢！