With the Electoral College in place, states can’t split their electors, who are people.
A person’s vote cannot be divided into fractions.
That’s not what I’m saying.
For example, take a state like Texas that has 254 counties.
Of those 254 counties, 240 of the rural counties vote Republican and the 14 liberal Urban counties vote Democrat.
The Rural counties would thus control all of the state’s Electoral College votes and as long as Texas had more rural than urban counties, Texas would remain a Republican state.