Derek Willis, NYT’s The Upshot:

Mayday should find opportunities on the Democratic side, backing primary candidates for whom campaign finance reform is a top issue against candidates for whom it is one of many. Having a presidential contest in 2016 will increase the field of potential targets compared with 2014. The number of freshman Republicans in the House facing their first re-election fight will provide some potential opportunities.

But unless Mayday can Republican primary voters to unseat incumbents on the issue of money in politics, winning a legislative majority that will change the current campaign finance rules looks dubious.

Indeed.