From the NYT Caucus Blog:

May was good for political Web sites. An Internet researcher, comScore Inc., reports that traffic to such sites jumped 17 percent to nine million unique visitors last month, the highest rate of increase among the 110 categories that the company studies.

Among the big gainers: MoveOn.org, whose number of visits rose by 246 percent to around 689,000, spurred by a petition against gas price increases, while the news site Politico.com’s sponsorship of the Republican debate May 3 helped fuel its 162 percent increase, to about 648,000 visitors.