From Reason:

“Anonymous participation is a critical element of our political process. Many transformative ideas and just causes, unpopular or controversial in their time, relied on anonymous arguments to the ultimate benefit of us all—from the abolition of slavery to the fight for Civil Rights,” says the R Street Institute, a public policy think tank. “The DISCLOSE Act eliminates the ability to participate in the political process as the Founders intended, free from intimidation or harm.”