Not sure this is a good idea, but it's good that it's being talked about. IRV is not perfect but I would like to see it implemented more. And, if we had proportional representation in Congress based on the Presidential vote, our Congress would have 14 Libertarians, 5 Greens, and 7 others (a situation I would consider desirable).
We don't vote for president based on who we want our representatives in Congress to be. If we did, I would've changed my vote for president in 2016.
I like the Argentine system actually.
Round 1 - simultaneous all-party primary on the same ballot, candidates signify what party they're wanting to represent, whoever gets most votes in a party's primary represents that party in Round 2, a party to be on the Round 2 ballot has to meet a minimum threshold (in Argentina's case, 1.5 to 2 percent).
Round 2 - all remaining candidates run, anyone gets more than 50% is declared winner, no one gets to 50% you have a runoff between the top 2 candidates
