Lyndon Johnson was the most left-wing member of the US Senate prior to becoming Vice-President in 1961. In 1963, President Kennedy was assassinated while visiting Lyndon Johnson’s home state.
Johnson then took over the presidency, created a fake military incident, and started a war which demoralized America and took 60,000 American lives.
More recently, the most left-wing member of the Senate again took over the presidency and …. you fill in the rest.