An Oregon initiative for a top-two system is starting to circulate. See the wording of the proposed constitutional amendment here. It does not mention ranked choice voting. It does not even say how many candidates would advance to the general election, but presumably it means top-two. Without ranked choice voting in the general election, if it were implemented to advance the top three, for example, that would result in many general elections with two Democrats and one Republican, or two Republicans and one Democrat. Almost no one would say that is a workable system, because it would be grossly unfair to the major party with two candidates; they would be at a disadvantage against the major party with one candidate.
The initiative seems to include presidential elections, because it covers all statewide races, and presidential elector is a statewide race. If this initiative had been in effect in 2016, it is very likely the only two candidates who would have been on the November ballot for president would have been Donald Trump and Bernie Sanders. In the May 2016 Democratic presidential primary in Oregon, Sanders got 360,829 votes and Hillary Clinton got 269,846. Given that Oregon Democrats preferred Sanders to Clinton by such a large margin, it is probable that a primary ballot used by all voters would have advanced Trump and Sanders. Therefore Hillary Clinton could not have carried Oregon in the general election. In the actual 2016 election, she did carry Oregon.
