This all, nevertheless, means that Democratic votes are less well represented in the house than Republican votes. There were reasons for the Electoral College when it was created, but the reasons are now irrelevant when one party is gaming the system to ensure their continued electoral dominance despite getting fewer overall votes.
I forget the exact numbers, but each Republican is in the Senate/House with around 30% fewer votes than each Democrat. The Electoral College is now nothing more than legitimized gerrymandering (and it's a stretch to call it legitimate).