The Monkey Cage has some useful data on the number of Americans who contributed to political candidates in 2008.
In Epic Journey, we discuss the congressional elections as well as the presidential contest. In this respect, we take note of today's Supeme Court decision, which held that the Voting Rights Act
"does not require state officials to draw election-district lines to allow a racial minority that would make up less than50 percent of the voting-age population in the redrawn district to join with crossover voters to elect the minority’s candidate of choice."