The Alaska Bush, central Juneau, midtown and downtown Anchorage, and the areas surrounding the University of Alaska Fairbanks campus and Ester have been strongholds of the Democratic Party. The Matanuska-Susitna Borough, the majority of Fairbanks (including North Pole and the military base), and South Anchorage typically have the strongest Republican showing. As of 2004[update], well over half of all registered voters have chosen "Non-Partisan" or "Undeclared" as their affiliation, despite recent attempts to close primaries to unaffiliated voters.