1-minute voting guide: Proposition 131 on all-candidate primaries and ranked-choice voting in Colorado

• Instead, it would open the primary to all candidates regardless of party affiliation and advance the top four to the general election.

Zoom in: In addition, Prop. 131 would decide who wins the general election by ranked-choice voting, allowing voters to designate their top candidates in order of preference.

• The first candidate to receive a majority of the vote would win.

Between the lines: The measure would only affect elections for these offices: Congress, governor, attorney general, secretary of state, treasurer, state legislature, state board of education and CU regent.

• It's estimated to cost $6 million more per year to hold the election, nonpartisan analysts say.

What they're saying: Proponents argue the new ballot method allows more voters to participate in the primaries, which are partially limited and typically favor partisans from either end of the spectrum.

Reality check: This new system is expected to boost moderate candidates and those with large amounts of money needed to get noticed in a wide-open primary.

• It would greatly reduce the power of political parties to pick candidates.

The other side: The opponents — which include the major parties — argue Colorado already makes it easy to participate in elections and this new method will create confusion among voters and lead to disqualified ballots.