Without further ado, here's Louisiana.
The Pelican State has been dominated by a single party since the end of Reconstruction. First it was the Democratic Party, dominated by a coalition of New Orleans businessmen and rural landowners, which was focused on maintaining the utter dominance of English-speaking whites at all costs, outlawing French as a language of instruction, maintaining racial segregation of all public and private facilities, and selling off much of the state's resource infrastructure to out-of-state big business. Huey Long and the People's Party arose in opposition to this last point, and managed to establish a modern big-government structure that kept the state going through and after the Depression, without doing an iota to improve race relations. The winds of change in the 1960s would see the People's Party booted out of government, replaced by New Orleans Mayor "Chep" Morrison and his National Party, who promised a gradual end to segregation and "the promotion or favoring of no one race or group, be it the English, the French, the whites, the blacks, the rich or the poor, over another".
Morrison died in 1978, handing the reins of power to his protégé Moon Landrieu, whose family has controlled both the party and the state ever since. Under the rule of the Landrieu family, Louisiana has been consistently rated among the lowest states in the Union in terms of average wealth, income disparity, disease prevention, imprisonment numbers, and government corruption, among other statistics. However, the National Party retains a strong rural base, centred primarily in the Florida Parishes and the north, and opposition forces often have trouble finding candidates to run against them in rural parishes. The strength of National dominance is further aided by Louisiana's electoral system, which assigns at least one seat to each parish, adding one additional seat for every 50,000 inhabitants. This means in practice that Tensas Parish's 5,000 inhabitants have one assemblyman, while Baton Rouge only has one for every 49,000. These apportionment rules do not, however, apply to New Orleans, which is given at least one seat for each of its seven municipal districts - this means heavy overrepresentation for Uptown New Orleans, another significant National stronghold. The opposition party in the National Assembly has traditionally been the
Bloc Action Cadienne (Cajun Action Bloc), which arose at about the same time as the National Party, and has French language rights as their main plank.
The 2008 elections were dominated by the handling of Hurricane Katrina. The Progressive Democratic Party, led by New Orleans councilman Marc Morial, campaigned on a Long-esque big government reconstruction program, and managed to surge to power on the New Orleans city council, winning in addition over a fifth of the statewide vote. However, owing to malapportionment, this netted them only twelve seats in the assembly, and the Nationals maintained a comfortable majority.
Over the next five years, Governor Mitch Landrieu (Moon Landrieu's son, who took office after his father's retirement in 2001) saw his hold on power tremble as scandal after scandal wracked his administration. However, the PDP's hands were hardly clean either, and two New Orleans councilmen were forced to resign after the revelation that they'd taken bribes from construction companies in exchange for favorable contracts. This left a significant power vacuum, as Governor Landrieu's approval ratings hit all-time lows while his poll ratings stayed up for lack of an alternative. In the winter of 2013, however, an unlikely challenger would emerge: his older sister, Senator Mary Landrieu.
At a press conference in February, Mary Landrieu launched the Movement for New Democracy, a new political party consisting of defecting National members as well as faces new to politics. Most of the sitting assemblymen who joined New Democracy had been internal dissidents against Mitch Landrieu's rule for several years before, and had stayed clear of corruption investigations. This gave the party a much-needed image of cleanness, and the speaking tours conducted by Mary Landrieu, Ray Nagin and Don Casayoux throughout the spring and summer were seen as a breath of fresh air, presenting a clear option to another five years of National rule. New Democracy even managed the feat of fielding candidates against the Nationals in all 129 seats, something not managed by an opposition party since the Nationals themselves in 1962.
Everything seemed set for a takeover, but Mitch Landrieu went on the counteroffensive in the final month of the campaign, stressing the need for stable governance and pointing out his party's record. In the end, New Democracy scored a seven-point lead in the popular vote, but malapportionment saved the Nationals once more, and they were returned in 58 seats, seven short of a majority. The PDP were able to gain slightly on their popular vote result from 2008, gaining inner-city seats in Alexandria and Lafayette thanks to vote splitting between the Nationals and New Democracy. In a particular showpiece of the unfair electoral laws of the state, the PDP trailed the Nationals by no more than nine percentage points, but gained only a quarter of their number of seats.