The Wall Street Journal offers this report (subscription required) on opposition by some Republicans to legislation that would restrict 527s. According to the WSJ: “In the 2006 campaign so far, it is right-leaning 527s that are most active. The Club for Growth, a conservative economic-issue group, is leading the charge to kill the Republican bill that would shut down 527s. The Club for Growth received $8 million in donations during the 2004 cycle; for this cycle, its donations as of May tally $5.1 million.” (Thanks to Tova Wang for the pointer.)