Republican Congressman Mark Foley of Florida admitted to, "alcoholism and related behavioral problems," and says he will enter rehab.

Foley quit his job on Friday after word of sexually suggestive e-mails he sent to teenage boys working on Capitol Hill.

The scandal swirling around the former Florida Congressman continues to widen. The FBI has opened an investigation into whether Foley violated federal law by sending sexually explicit e-mails to male congressional pages under 18.

That is on top of a possible House Ethics Committee investigation and a call from House Speaker, Republican Dennis Hastert, echoed by others in his party, for the Justice Department and Florida law enforcement to look into the matter.

"The best thing to do on every count is to get the facts out there as quickly as possible and then let the chips fall as they may," says NYS Representative Peter King.

But Democrats say it is too little too late. They accuse the Republicans of a cover-up to maintain their majority in Congress.

"It looks to me that it was more important to hold onto a seat and to hold onto power than to take care of our children," says Democrat Tim Mahoney, who is running for Foley's seat.

Republicans have known about Foley's obsession with male pages for at least five years. But little was done, other than issuing a warning.

ABC News obtained Internet messages sent by Foley to three different pages since that warning was issued. Messages sent to two pages contained sexually explicit messages, most too graphic to be broadcast.

This does throw plans to hold onto Foley's seat into disarray. A replacement will be chosen today, but Foley's name will still be on the ballot, and the new candidate will only have five weeks to campaign.