Rhonda Schwartz contributed to this report. Saying he was "deeply sorry," Congressman Mark Foley (R-FL) resigned from Congress today, hours after ABC News questioned him about sexually explicit internet messages with current and former congressional pages under the age of 18. A spokesman for Foley, the chairman of the House Caucus on Missing and Exploited Children, said the congressman submitted his resignation in a letter late this afternoon to Speaker of the House Dennis Hastert. THE BLOTTER RECOMMENDS Sixteen-Year-Old Who Worked as Capitol Hill Page Concerned About E-mail Exchange with Congressman Rep. Foley’s Opponent Calls for an Investigation into Allegations of Inappropriate E-mails with Former Page Click Here for More of the Brian Ross Page Hours earlier, ABC News had read excerpts of instant messages provided by former male pages who said the congressman, under the AOL Instant Messenger screen name Maf54, made repeated references to sexual organs and acts. In a statement, Foley said, "I am deeply sorry and I apologize for letting down my family and the people of Florida I have had the privilege to represent." The full details will be included in a report tonight on ABC World News with Charles Gibson. Click here for the previous report on the e-mails sent by Rep. Foley.