The Campaign Legal Center has issued this very interesting press release, which begins:

Washington — A federal trial judge in Washington handed a victory to pro-reform groups in a key campaign finance case today, ruling that subpoenas issued to the groups were irrelevant, burdensome and unduly oppressive.
The case – North Carolina Right to Life v. Leake – involves a challenge to a North Carolina law that limits contributions to independent expenditure political committees. The Campaign Legal Center and Democracy 21, two leading campaign finance reform groups, filed an amicus – or “friend of the court” – brief in the case arguing that the law was a constitutional exercise of North Carolina’s power to fight political corruption.
The attorney for the right to life group – James Bopp, Jr., a campaign finance reform opponent – asked the court to re-open the completed discovery process and demanded the two groups provide detailed information about contacts between these groups and 28 other organizations, including National Public Radio. Among many other things, the requests sought information about the sources of the groups’ funding.