SC’s governor is also R; both SC US Senators are R vs WI’s 1R/1D; the Congressional delegations: WI = 5/8 R and SC = 6/7 R.
WI 2014 Population (5.758) is not twice 2014 SC population (4.832M). that is reflected in the # of House seats.
as an addendum to my earlier reply: The R candidate in 2012 carried SC, and that also influences # of delegates to the nominating convention.