WASHINGTON -- Florida Sen. Bill Nelson is leading the charge for a mail-in ballot re-vote so that Florida voters can be seated and their delegates counted at the Democratic National Convention in August.

Nelson, a Hillary Clinton supporter, hit the airwaves on Sunday, and offered an op-ed in Monday's Wall Street Journal, to explain why the mail-in process would be the fairest and most economical way to include Florida's delegates, who had been stripped from the count because the state held its primary before Feb. 5, Super Tuesday.

Michigan too was penalized and is also looking to be counted.

Nelson wrote that he has already spoken with Republican Gov. Charlie Crist, who would support the idea of a mail-in ballot, but it would have to get started soon.

"Overseas ballots would have to go out by the third week in April. Voters in Florida would have to get their ballots the first part of May. And we would need to set early June deadlines for ballots to be returned and tallied," he wrote in the Journal.

As Nelson looks for an alternative to the Jan. 29 vote, The New York Sun reported in Monday editions that civil rights leader Al Sharpton is threatening to sue Florida if it counts the Jan. 29 vote. Sharpton, the newspaper said, is traveling to the Sunshine State to get affidavits from residents who will say they skipped the primary because they figured it wouldn't count, and to include the results at the convention would end up disenfranchising them.

Nelson doesn't yet have the support of the Democratic presidential primary candidates, who declined to campaign in the state. Clinton won both Florida and Michigan, although Barack Obama didn't have his name on the ballot in Michigan.

Clinton co-chairwoman Rep. Debbie Wasserman-Schultz appeared cold to the mail-in vote idea on Sunday, saying the state had never conducted a mail-in ballot and that an election as tight as this one was not the time to start experimenting.

Still, with unrest growing among Democratic ranks and party leaders refusing to pay for a new primary, Nelson says this is the best solution for a bad situation.

"A mail-in vote -- which Oregon has used successfully for years -- would be cheaper, less cumbersome and more inclusive than attempting at this late hour to stage a full-fledged return to the polls. It also would give voters enough time to take a closer look at the candidates, and further study their positions on the issues. A mail-in vote would also allow us to send ballots to military voters overseas," he wrote.

Obama currently leads in the delegate race and if Florida and Michigan are included, Clinton can narrow the gap and claim to be even closer in the popular vote -- just 5,000 shy of Obama compared to down 600,000 votes without Michigan and Florida.

If the states are added, it would increase the number of delegates available by 313, and change the 2,025 delegate threshold needed to win the nomination.

As for Michigan, Sen. Carl Levin, appeared amenable to a mail-in solution for his state.

"The one possibility would be some kind of a mail-in caucus," Levin told ABC's "This Week." "But there's some real problems with that, too. Not just cost, but the security issue. How do you make sure that hundreds of thousands, perhaps a million or more ballots can be properly counted and that duplicate ballots can be avoided?"

Click here to read The Wall Street Journal editorial by Sen. Bill Nelson.

Click here to read The New York Sun report on Al Sharpton traveling to Florida.