Former mayoral candidate Sulaimon Brown told The Washington Post that he struck a deal last summer with the campaign of Mayor Vincent C. Gray to continue his attacks on incumbent Adrian M. Fenty in exchange for a city job if Gray won. Brown, who was recently dismissed from his $110,000-a-year position with the D.C. Department of Health Care Finance, also alleges that two Gray campaign aides gave him a series of cash payments to help finance his campaign. The Post could not independently verify any payments. In an interview Saturday, Gray adamantly denied Brown's allegations, saying the campaigns did not...