In October of 2005, the U.S. House of Representatives passed H.R. 1461, The Federal Housing Finance Reform Act. This bill contained a Low Income Housing Fund, which would assist local agencies in providing much-needed housing for low income families. This bill, however, contained a rider saying, in effect, that any agency which does any kind of work around voter registration would be ineligible for funding. Not only that, but here's the kicker, if they had done any of this kind of work in the previous 12 months to applying, they would also be ineligible.
Almost immediately, Multnomah County, Oregon (where I live) contacted the housing agencies with which it does business, and told them to cease all voter registration work. They are not even allowed to have voter registration forms in their offices for people to pick up.
First, let me point out that, as of the first of June, 2006, this bill is not even law yet. The senate counterpart to this bill, S. 190, has yet to be referred to the floor. In any case, the Senate version does not include this heinous voter registration restriction.