In 2000, loopholes in the disclosure requirements for 527 groups – similar to the loopholes today for 501(c) nonprofit groups – led Congress to act quickly to restore effective campaign finance disclosure requirements.
"The disclosure legislation was enacted by Congress in 2000 with overwhelming bipartisan support.
The Senate passed the bill by a vote of 92 to 6, with 48 Republican Senators voting for the loophole-closing disclosure legislation and only six Republican Senators opposing the bill. Needless to say Senator McConnell was one of the six Senators voting no.
Fourteen current Republican senators voted for the loophole-closing disclosure legislation in 2000. They include: Senators Thad Cochran (MS), Susan Collins (ME), Michael Crapo (ID), Mike Enzi (WV), Chuck Grassley (IA), Orrin Hatch (UT), Kay Bailey Hutchison (TX), Jon Kyl (AZ), Richard Lugar (IN), John McCain (AZ), Pat Roberts (KS), Jeff Sessions (AL), Richard Shelby (AL) and Olympia Snowe (ME).
Today, with a Senate cloture vote scheduled on Monday on S.3369, the DISCLOSE Act of 2012, no Republican Senators have said they will support the disclosure legislation."