With the United States presidential primaries so competitive for both the Democratic and Republican parties, it’s no surprise that some sites are using mapping to help understand the preference by state and county across the country. The Electoral Map is a relatively new blog that looks at politics and geography. Political Maps with the byline “Political News as told by maps” also tracks the primaries from a mapping perspective. With the candidates seeming to show up in a new state every hour, Slate.com has an interesting Google mashup showing where presidential candidates are campaigning. At the top of the mashup is a slider to tighten or broaden the timeline mapped. A legend on the right allows you to choose which candidates are mapped. The Google LatLong Blog also has a post with additional mapping resources.