At Sunday's protest, organizers said Mr. Saakashvili and his government had undermined the opposition by denying it access to the news media and by rigging elections, charges the government has always denied.
His campaign has filed complaints with the election commission charging the Brotherhood with systematic violations of the electoral laws.
Shortly afterward, however, her defeated Socialist Party opponent from the 1971 national election charged that she had violated the election laws in that contest.
The leader of the opposition Grand National Party, Lee Hoi Chang, whom Mr. Kim narrowly defeated in the 1997 presidential election, charged that Mr. Kim sought to silence critical media in his effort to persuade the North Korean leader, Kim Jong Il, to visit Seoul.
A lawsuit filed in January 2001 sought to prevent similar errors, while another, filed just before the 2000 election, charged that the ban on felons voting discriminated against blacks and should be overturned.
A black group in the racially divided Amityville school district on Long Island is taking legal action to overturn last month's school board election, charging that its slate lost because officials mishandled the results from a faulty voting machine, resulting in an all-white board.
The big debate now is about the two politicians who are due to appear before the International Criminal Court at The Hague just weeks after the 2013 election, charged with displacing, torturing, persecuting and killing civilians during Kenya's election crisis.
