LBJ was not on the hard left. He was a New Deal Liberal and his Great Society was just more of FDR’s soft socialism.
Johnson was a Cold Warrior anti-communist which is why he was willing to continue the fight in South Vietnam. The hard left hated him and you can see LBJ hung in effigy in pictures of antiwar demonstrations.
Actually, LBJ was a hard left socialist/communist including his “Great Welfare Socialism” programs that has cost American taxpayers $20 TRILLION in wasted money.
btw, FDR was another hard left communist and was just as responsible as Stalin for the dark communism that fell on Eastern Europe after WW2.
The “hard left” wanted the radical LBJ to be more radical.
I know...I was there.