Ignore how unrealistic this may seem for a minute and let's take this question and attempt to answer it instead of debating if the man was even capable of the things being mentioned here, due to how much of a nut he was.
In OTL, Lyndon LaRouche was an insane radical whackjob who ran for President eight times and was never elected to any political office. ITTL, let's imagine this alternate scenario, LaRouche decides to run for Congress in 1956 as a Democrat, primarying out Emmanuel Celler or Eugene J. Keogh. In order for this to happen, he tones down both his marxist believes a smidge as well as his conspiratorial beliefs (or at least keeps them private and close to the chest) and becomes a far-left mcgovernite Democrat in the 60s, though more to the left than McGovern. In 1968, he defeats Jacob K. Javits in the United States Senate Election, entering the Senate. He runs for President in 1972 as a fiscal far-leftist, social far right Senator. He doesn't get nominated and when he's rejected from speaking at the DNC, he decides to speak at the RNC, where he announces he is switching parties and gives scathing critiques of McGovern, Muskie, Humphrey, and other prominent Democrats. He wins a second term in 1974 and attempts to primary out Ford in 1976 alongside Reagan and he wins Iowa, Florida, West Virginia, Kentucky, and Tennessee. During his time as a Republican, he begins to becomes a Socially Far-Right, Fiscally Left Neoconservative that is liked by a certain amount of his political party, not a massive amount like Reagan, but he is enough of a rising star that when he runs for President a third time in 1980. H. W. Bush is not around, having died in a plane crash around 78-79. LaRouche places second to Reagan and in order to unite the party, Reagan forms a ticket with LaRouche, who has 24 years of Congressional Experience behind him. Reagan/LaRouche defeats Carter/Mondale in 1980 and then in March of 1981, Reagan is assassinated by John Hinckley Jr., leading to LaRouche succeeding him as President.
How does this slightly toned down LaRouche act as President from 1981-1989? Can his policies be enacted and if they can, what is they extent can they be enacted? Can he win a second term in 1984? Who does he pick as his VP? Who is in his administration? What is his political legacy going forward?
In OTL, Lyndon LaRouche was an insane radical whackjob who ran for President eight times and was never elected to any political office. ITTL, let's imagine this alternate scenario, LaRouche decides to run for Congress in 1956 as a Democrat, primarying out Emmanuel Celler or Eugene J. Keogh. In order for this to happen, he tones down both his marxist believes a smidge as well as his conspiratorial beliefs (or at least keeps them private and close to the chest) and becomes a far-left mcgovernite Democrat in the 60s, though more to the left than McGovern. In 1968, he defeats Jacob K. Javits in the United States Senate Election, entering the Senate. He runs for President in 1972 as a fiscal far-leftist, social far right Senator. He doesn't get nominated and when he's rejected from speaking at the DNC, he decides to speak at the RNC, where he announces he is switching parties and gives scathing critiques of McGovern, Muskie, Humphrey, and other prominent Democrats. He wins a second term in 1974 and attempts to primary out Ford in 1976 alongside Reagan and he wins Iowa, Florida, West Virginia, Kentucky, and Tennessee. During his time as a Republican, he begins to becomes a Socially Far-Right, Fiscally Left Neoconservative that is liked by a certain amount of his political party, not a massive amount like Reagan, but he is enough of a rising star that when he runs for President a third time in 1980. H. W. Bush is not around, having died in a plane crash around 78-79. LaRouche places second to Reagan and in order to unite the party, Reagan forms a ticket with LaRouche, who has 24 years of Congressional Experience behind him. Reagan/LaRouche defeats Carter/Mondale in 1980 and then in March of 1981, Reagan is assassinated by John Hinckley Jr., leading to LaRouche succeeding him as President.
How does this slightly toned down LaRouche act as President from 1981-1989? Can his policies be enacted and if they can, what is they extent can they be enacted? Can he win a second term in 1984? Who does he pick as his VP? Who is in his administration? What is his political legacy going forward?