From Ethics Alarms:

Should that enter into the sentencing calculations, or should they be based on the legal fiction that those other cases, now closed, were truly unsolved?  I don’t think that’s as easy a question as the advocates for the Durbin-Grassley bill would have us believe. The Cato Institute, Americans for Prosperity, the American Conservative Union, Americans for Tax Reform, Freedom Works, Prison Fellowship, the R Street Institute, Right on Crime, and Koch Industries, among other activist and professional groups from right and left on the political spectrum support it.