I agree with you for the most part, but I’d point out that the dem party may be growing, not shrinking. The moderates, the blue dogs and others may feel the party has changed, but seem to be ok with the new ownership (far left whacko’s).
They have taken control of the education budgets and the schools through the teachers unions and turned our public schools into indoctrination centers.
Young people today graduate knowing very little American history and have their minds stuffed full of liberal claptrap.
If sensible people do not somehow regain control of the schools the ultra-left radicals will eventually win the war through sheer numbers.