The federal lawsuit was filed hours after a Kansas judge ordered Shawnee County officials to give a Democratic legislator and her Republican opponent a list of voters who cast provisional ballots in this week's election.
A former Democratic leader will return to the Kansas House following this week's election, but former State Treasurer Dennis McKinney has failed in his attempt at a legislative comeback.
The GOP appeared poised to maintain its majorities of 32-8 in the Senate and 92-33 in the House following Tuesday's election. Some races remained very close Wednesday.
Republicans have won a Kansas Senate contest that featured two incumbents who were forced to run against each other in northwest Kansas because of political redistricting.
A Kansas state school board member has won re-election over a challenger who has an anti-evolution platform and ties to a Topeka church known for picketing military funerals.
Romney had been expected to win easily in Tuesday's election in the GOP-leaning state, where a Democrat hasn't prevailed since President Lyndon Johnson in 1964.
Staff members at a southeast Kansas hospital are going room-to-room delivering ballots to patients too ill to make it to their regular polling stations.
Kansas Gov. Sam Brownback's allies want conservative Republicans to dominate the Legislature after the election so that he'll have a free hand to remake the state.
Republicans looked to repeat their sweep of the four Kansas congressional districts, keeping the House seats in the party's hands for the second straight election cycle.