The Environmental Law and Policy Center gets up to $10,000 worth of Google ads provided free of charge each month to help promote its green efforts, including one aimed at reaching Iowa caucus voters. A search for "Hillary Clinton" turns up an ad suggesting that users "Learn how Hillary Clinton proposes to solve global warming." Targeted to presidential candidate names, the ads link to IowaGlobalWarming.org, and are part of a year-long campaign set to finalize after January's Iowa caucuses.

The problems of comparing ActBlue to ABC PAC; a profile of Robert Bluey's Conservative Bloggers Briefings; and why aren't more candidates using Google Adwords to advertise against news- and issues-based keywords?