To add on to Sgt Zims; Originally the House of Representatives was set to have one representative per a specific number of citizens. It seems to me that citizens then were not the same as citizens now. For someone to vote for their rep they needed to be educated and may have had to own property. Requirements for inclusion into the electorate have been relaxed since those strict definitions. Additionally it was seen that the growth in population would result in a completely unwieldy number of reps. The total number of reps was limited to 435 but sorting them to various states amounted to obtaining the total population of voting citizens, dividing by 435 then drawing districts that come near the number for one rep. Having electors for the electoral college assigned proportionate to the number of reps and senators maintained the idea of a democracy where the citizens voted for their leaders. However while the electors based on number of Reps was related to the population, the electors based on Senators is a function of states. this was where the states such as Delaware and Rhode Island sought equality with Virginia and New York. Each state had 2 senators, therefor two electors.
But I think the real issue is not with the organization of the electoral college as it is with the manner that each state casts their ballots. Most of the states operate on the principal of winner-take-all. This applies to big states and little ones. Say a state is large and has 30 electoral votes. It has an election and 6,000,000 votes are cast. Let's say 4M were for A and 2M were for B.
In the "popular" system A would get 4M votes, B would get 2M
In the electoral college system from a state that is winner take all, A would get 30 electors, B would get 0
In the electoral college system from a state that prorates the electors (depending on the districts total, but for example) A would get 20 electors, B would get 10.
What system the candidates are seeking now is obscured because all that I've heard is that the electoral college should be eliminated but no plan for replacement has been offered.