Demonicrats have been socialists at least since FDR, and UN buttboys since Truman. By the 1960s, high school world history books were already spouting the Demonicrat and UN commie propaganda lies.
Go further back. The Socialist wing dumped the last Conservative Democrat President in 1896 with Grover Cleveland, replacing him with William Jennings Bryan. Only in 1904 and 1924 did centrist/center-right Democrats capture the party nomination for President (centrist Judge Alton Parker in ‘04, perhaps more Conservative than Theodore Roosevelt and ex-Solicitor General John W. Davis in 1924, who was a Conservative, the last time two Conservatives had both party nominations, facing off against Calvin Coolidge, to the utter hysteria of the left, who endorsed Socialist Republican Sen. Bob La Follette, Sr.).
FDR launched his purge of Conservative Congressional Democrats by 1938, which began to dwindle in numbers over the next 3 decades, and were effectively eliminated with the Watergate elections of 1974 and the Marxist McGovernite takeover.
Of course, the GOP now is Socialist, too. They haven’t rolled back a leftist Democrat agenda since 1921 under President Harding and a GOP supermajority.