I want to know the answer to the following question:
Which two states designated their assigned votes based on their districts?
All the background I'm provided with is that "Rather than assigning all 9 of the state's electors to the candidate with a plurality of popular votes, under the amendment Colorado would have assigned presidential electors proportionally to the statewide vote count, which would be a unique system (Nebraska and Maine assign electoral votes based on vote totals within each congressional district).". Is that enough to answer the question?
Answer: yes