I don't know why this got downvoted, this is a pretty common theme across America. Look at the Alabama senate race and pretty much every race in North Carolina

I don't know why this got downvoted, this is a pretty common theme across America. Look at the Alabama senate race and pretty much every race in North Carolina for examples. This, as well as gerrymandering, has lead to the disproportions in the house and state governments. Democrats being concentrated makes it much easier to have close races in terms of total votes cast per party, but disproportionate representation.