Someone had a chart of how the states voted in Presidential elections based on how states voted together. At the extreme, Alabama and Mississippi haven't voted differently (although the Civil War and Reconstruction did prevent some votes) since 1840. Hawaii and Rhode Island have voted together since 1960, and it is hard to think of states more separate in geography than those two... except perhaps Alaska and Oklahoma.
Thirteen states (except for the bare one-time exception of the Second Congressional District of Nebraska) have voted for the Republican nominee for President, and seventeen states and DC have voted for the Democratic nominee for President in the last five Presidential elections. Nobody would confuse South Carolina and South Dakota, and nobody would confuse Pennsylvania and California.
Do you have a link to aforesaid chart? If it exists, I would like to see it.
