The reason the electorate remains leftist is this: the more conservative one is, the more likely that one will leave.
Yet those on the dole stay, along with the intellectual elitists.
Harvard and the slums. All literally throwing money down the rathole (bigdig).
It is a good thing to keep them bunched up in groups, this way. Mecca and Boston.
They had 16 congressional seats and 16 votes for president in the 1920's.
Now they have 10 seats and 10 votes.
Soon they will lose another one...maybe two in the next census.