Well, I hope this is any good. First time making one of these, or adventuring in American Politics.
The birth of the Sixth Party System would, in some ways, mirror the changes going on in Europe, at the time. Morgenthau had proven a disaster, in most ways. With the failure of the Morgenthau Plan in Germany, and American forces being expelled from the continent by its former allies, the Soviet Sphere advancing through the world, it seemed like the Democratic President, after nuking Japan, nuked his foot. The Democratic Party itself was falling apart. In New York, the Liberal party had turned into a national party under its leader, Wendell Willkie. The former Presidential nominee had projects with the late FDR to unite New Dealers and Liberal Republicans into a single party. With FDR dead, and Willkie in a relatively precarious situation, that objective would, at best, be only partially accomplished. Finding its niche as an anti-communist, internationalist, pro-business and pro-New Deal party, the Liberals would perform admirably in their first outing, winning New York (mostly thanks to the local four-way vote splitting), and Massachusetts, partially thanks to his running mate, Joseph Kennedy, and his connections. A similar story was told by the new Populist Party. Led by Henry Wallace, it had begun its life as the Progressive Party, back during the former Vice President's break with the Democratic Party, back when the Morghenthau Plan started. The party had ballooned since then, making deals with the Wisconsin Progressive Party, and later, with the split of the Minnesora Democratic-Farmer-Labor Party back into two entities, with the reborn Minnesota Farmer-Labor Party. Lastly, the Communist Political Association and the American Labor Party, after initial passive support, would officailly join the coalition in 1947, joined by part of the Nonpartisan League in early 1948. Later in 1948, in preparation for the elections, the six parties would formally merge into the People's Party. The four way vote split in much of the country would do them no favors, however, and despite a pretty strong showing in the popular vote, would be the last party in the elecotral vote. The remnants of the Democratic Party tell a different story. In the aftermath of Morgenthau's Presidency, it was obvious the former president couldn't be nominated to run for a regular election. Thus, with both Wallace and Willkie on the rise, a choice was made. To try and force a Contingent Election, to at least have somewhat of a chance to win. For this, the Kerr/Harriman ticket was born. Kerr, a successful Pro-New Deal Governor of Oklahoma, and Harriman, who had served under Roosevelt in various roles, were meant to invoke an image of a better time for the Democratic Party, and they were successful at that. So successful that many Southern Democrats, hoping for their time in the sun, would start grumbling, in the background. When the nominees decided to try and match Wallace somewhat on race and add desegragation of the army to their platform, the camel's back would be broken for many Southern Democrats, who walked away to form the States Rights (or Dixiecrat) Party. Intended to be more of a show of force to the party proper, rather than a proper split, as evidenced by the divisiveness of the act among the Southern Democrats themselves, States Rights would later end up becoming a permanent feature of the Sixth Party System, almost by mistake. Finally there were the protagonists, the Republicans. After 16 years of Democratic rule, and Morgenthau, everyone but a few optimists believed it was time for the Republican Party to come back in style. The America it was coming to power in, however, wasn't what it once was, and the Party itself was split on the matter of the New Deal. Liberal Republicans had been realatively strong for the most of that time, but Taft's conservatives had always lurked around the corner. After the birth of the Liberal Party as a national entity, Liberal Republicans suddenly found themselves at a disadvantage within and wihtout their party. Thus, Thomas Dewey, formerly in the running for nomination, decided to try and draft Dwight D. Eisenhower in. Eisenhower was in many ways a popular man, and a war hero for many. Yet, his actions during the implementation of the Morgenthau Plan had been controversial, with many crediting him of its failure or accusing him of delibrately sabotaging it. With opinion on the Plan turning sour, however, opinions on Eisenhower started turning to a prevailing positivity, even though many, many people still considered his actions treason. For Eisenhower, however, what mattered was not having Taft in power, convinced by Dewey to run to avoid Taft at all costs, and keep the fight against Communism going, the former General reluctantly accepted, narrowly managing to win the nomination. In this, Liberal Republican Earl Warren would be picked as his running mate, suggested by Dewey himself, reinforcing the ticket's image. Come the actual elections, they would prove as much of a mess as anyone expected. Except for the Democrats, who really hoped for that Contingent Election for a second. Thus, with a four or five-way vote split pretty much everywhere in the country, popular vote and electoral vote could vary wildly, and vary wildly they did. Especially for the Democrats. In the end, despite Eisenhower being still realatively controversial, the Republican Party would win the elections. Events in the following years the United States would have to face many challenges, not least of which their forced isolation on the world stage. But with such results, and an opposition... well, what opposition? It really seemed like a second Era of Good Feelings was about to begin.