Better Late Than Never
The Kingfish was certainly past his prime, that much was certain. He was still sharp, of course and still vividly recalled that day in 1935 where a madman's bullet had nearly forced him from the mortal coil. But despite his survival, his ambitions were quickly put in check. The Share Our Wealth proxy campaign he sought to have cost Roosevelt the White House fizzled. His own 1940 challenge was easily crushed. And Roosevelt managed to capture national, universal popularity in the aftermath of Pearl Harbor and the war that ensued. Long had done his part to support the country in that time, but after the war it seemed his career was in essence dead. The left wanted younger champions before McCarthy strangled it with demagoguery and the other southern Democrats cared more about Jim Crow than the welfare of the common man. Oh, Long was not nobody in the Senate-he fiercely denounced McCarthy, fought for Truman's healthcare plan and earned the respect of northern progressives by refusing to sign the Southern Manifesto while many southern Democrats (including Majority Leader Lyndon Johnson) did. It's likely for this reason that Long was approached by a young Massachusetts Senator to be his Vice President. Long's presidential aspirations were subdued by this point by the sting of defeat in 1940 and 1952 and Jack seemed a nice enough boy. So he joined the ticket and Kennedy brought him just a heartbeat away from the presidency.
Of course, things weren't so rosy once governing began. Kennedy was in many ways like Roosevelt to Huey-too timid to do what needed to be done. Too willing to listen to advisors who urged unwise conduct (for instance, by escalating involvement in Indochina or invading the Bay of Pigs). Still, Long remained Vice President even with the internal struggle between the two men nearly reaching the point of Kennedy attempting to swap him for someone more palatable. But before it reached that point a certain communist in Dallas blew the young president's brains out. And suddenly, the dream that had eluded the Kingfish finally came true-albeit in the worst possible way. Long mourned Kennedy despite their differences and his own eagerness for power-not that it has stopped the fringe theorists from claiming Long had him offed to gain power for himself.
And what he did with that power. Long discarded the original name for his program-'Share Our Wealth' was uncomfortably communistic in the middle of the Cold War. But he decided on Johnson's suggestion of a 'Great Society.' It was a truly bold program. Long signed the Civil Rights Act of 1964 to fight Jim Crow laws and establish voting rights for southern blacks, despite the grumbling of the Dixiecrat contingent. He established a federal Department of Education and made the first two years of college free for all Americans. Long's biggest triumph was the implementation of Medicare, a national healthcare system modeled after Britain's NHS that was controversial to begin with but by the present is one of the untouchable sacred cows of American politics. Long also implemented inheritance caps and a maximum wage though the latter died after his presidency.
On foreign policy, Long would face more difficulties. His pre-World War II isolationist instincts, while subdued by outside circumstances, did prove irksome to the US military. Long worked to keep American involvement in Indochina as limited as possible and sought to pursue normalized relations with Cuba and Mao's China. For these, he was denounced as a cowardly appease by conservatives and even more moderate Republicans. While he crushed Goldwater in 1964, in 1968 the race proved to be far closer. Long fought tooth and nail against former Vice President Richard Nixon (running alongside conservative southern Republican John Tower of Texas). Long actually managed to win the popular vote in that election, but the electoral college narrowly went in Nixon's favor, forcing the Kingfish to retire to Louisiana.
However, Nixon's administration soon began to struggle. His rapid and extreme escalation of American involvement in Indochina provoked a backlash among college students and his efforts to appease conservative Republicans by chipping away at Long's programs likewise provoked widespread anger. Long himself would become an icon to the opponents of Nixon and attended a few antiwar rallies as a speaker. In late 1971, Long shocked observers by announcing he would be pursuing a bid for a nonconsecutive term. Unfortunately for him and his supporters, however, Long would suffer a fatal stroke on January 16, 1972, dying before any ballots could be cast. Despite this, Long remained an icon to the young left and eventual nominee and winner Eugene McCarthy won vowing to continue his legacy. To date, Long ranks highly among many historians as a man who, against the odds, changed America.
(Please ignore Humphrey being listed as his VP it's meant to be Muskie)