Assuming a slightly different US Constitution, such that the member of the House of Representatives are voted on by all the voters in each state, without the states being broken up into districts that vote for a single seat, what would be the likely consequences of this, and how the voting work? Each voter would be able to vote for more than one Representative, (assuming their state had more than one) but how many, and would this result in a more proportional representation, or would it make it so that individual states would have all or nearly all of their Representatives be of a single party?
And if this doesn't result in a proportional representation system, how could the Constitution be modified so that the elections are more or less proportional, at least for the states that have more than a single Representative? (Either through changing what it was originally, or through amending the above version.)
Also, how would this change the Electoral College, if at all? Would it become more proportional?