Muslima Lewis, a lawyer with the American Civil Liberties Union in Florida, said: “Really, you’re not having a full participatory democracy if you disenfranchise so many people. It weakens the whole system and, in particular, communities of color.”

All of Us or None, a prisoner-advocacy organization in San Francisco, held a rally last month about restoration of voting rights in California. Also last month, the Colorado Criminal Justice Reform Coalition successfully lobbied the Denver County jail system to begin registering felons upon their release.

The A.C.L.U. is also advising lawyers’ groups planning to deploy to polling places in November to enforce the rights of former convicts who have restored their voting privileges.

According to the A.C.L.U. only two states, Maine and Vermont, allow prisoners, parolees and probationers to vote. Thirteen states allow parolees and probationers to vote, eight states reinstate probationer voting rights, and 20 states restore voting rights to people who have completed their sentences, although each state has different processes, exceptions and limits on eligibility requirements. Kentucky and Virginia permanently disenfranchise nearly all felons.

Florida’s felony voter registration law divides applicants into three categories based on the seriousness of their crimes: nonviolent criminals, the biggest group, need not apply for restoration of voting rights and just need to re-register. Violent criminals, but not murderers or rapists, must apply to the clemency board. The board either grants those rights immediately or investigates on a case-by-case basis. The most violent criminals are subjected to a more rigorous investigation and must attend a hearing of the clemency board, which meets only four times a year, before their rights can be reinstated.

Despite the state’s liberalization of felony voter procedures, only 9,000 out of a potential 112,000 former convicts in Florida registered to vote in the last year, according to a report last month in The Orlando Sentinel. Part of the reason is that thousands of notifications sent by the state went to the wrong addresses because of poor data and former prisoners’ high mobility.

Fred Schuknecht, the director of administration for the Florida Clemency Board, acknowledged in an interview that there was a backlog of 60,000 former felons who could potentially have their rights restored, but must first be reviewed by the agency. Despite the fact that 3,500 newly released prisoners are added to the caseload every month, the Legislature cut 20 percent of the staff devoted to felony voter restoration cases, Mr. Schuknecht said.