The state Office of Elections has tentatively set May 22 for a special election to fill out the remainder of U.S. Rep. Neil Abercrombie's term in Congress.

Abercrombie, D-Hawaii, is resigning on Sunday to return to the Islands and campaign full time in the Democratic primary for governor.
Former congressman Ed Case, state Senate President Colleen Hanabusa and Honolulu City Councilman Charles Djou have said they would run in the special election.
The victor of the winner-take-all special election would fill out the remaining months of Abercrombie's term, which ends in January 2011.
The three candidates have also said they plan to run in the September primary and November general election to replace Abercrombie in Congress.
The date for the special election was included in an invitation to bid for vendors interested in providing voting equipment.
Scott Nago, the state's chief elections officer, said he would likely issue a proclamation calling the special election in late March, after the bids are reviewed.
The state needs new voting machines for the special election because of legal challenges to the voting machines used in the 2008 elections.