Keeping the missing emails missing

I am not a lawyer but I am a logical person. On the basis of logic and an assumption that logic must play some part, however small, in the law I do not understand how the White House would even attempt to make the argument that email accounts in the Republic National Committee domain which supposedly only existed to keep political activity separate and isolated from executive activity may be withheld from Congress on the basis of executive privilege.

Maybe they teach 'em different down at the Regent University School of Law!