Over the last few decades, presidential election outcomes within the majority of states have become more and more predictable, to the point that only ten states were considered competitive in the 2012 election. Due to the state-by-state winner-take-all method of allocating Electoral College votes, competitive states receive much more campaign attention than their non-competitive counterparts.
The table below provides a state-by-state review of presidential outcomes and competitiveness. It shows how some states have not been competitive for than a half-century and how most states now have a degree of partisan imbalance that makes them highly unlikely to be in a swing state position for at least a decade. Additional information is available for download in PDF and Excel formats.