With dozens of Democrats lining up to run for President in 2020, now is the time to adopt ranked choice voting in early states to guarantee that primary winners have clear majority support. Greater choices for voters is welcome, but crowded primaries can produce “winners” with less than 25 percent of the vote. Meantime, millions of Democratic voters could fail to elect any delegates at all because their candidate falls below the 15 percent qualifying threshold. Someone could easily win the nomination over the expressed opposition of most primary voters.

Consider the 2016 Republican primaries, which featured more than a dozen credible candidates. With provocative rhetoric making him the favorite of a passionate minority, Donald TrumpDonald John TrumpRosenstein expected to leave DOJ next month: reports Allies wary of Shanahan's assurances with looming presence of Trump States file lawsuit seeking to block Trump's national emergency declaration MORE captured the nomination despite falling short of a majority in the first 40 primaries and caucuses and polls indicating he would have lost in most early contests in head-to-head races against opponents like Sens. Marco RubioMarco Antonio RubioRubio in Colombia to push for delivery of humanitarian aid to Venezuela On unilateral executive action, Mitch McConnell was right — in 2014 On The Money: Trump declares emergency at border | Braces for legal fight | Move divides GOP | Trump signs border deal to avoid shutdown | Winners, losers from spending fight | US, China trade talks to resume next week MORE (R-Fla.) and Ted CruzRafael (Ted) Edward CruzEl Chapo's lawyer fires back at Cruz: 'Ludicrous' to suggest drug lord will pay for wall Democrats have a chance of beating Trump with Julian Castro on the 2020 ticket Poll shows competitive matchup if O’Rourke ran for Senate again MORE (R-Texas).

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Next year’s Democratic race presents the same fractured dynamics. Moreover, Democrats require states to allocate delegates in proportion to the vote, so that a candidate winning a state with 33 percent of the vote takes about a third of the delegates, not all. This “fair reflection” principle makes more votes count. But winning the nomination on the first convention ballot requires a candidate to arrive with more than half the delegates; otherwise, super-delegates have an equal say in deciding a brokered convention. Democrats will need as much fine-grained information as possible about what their voters really want.

Current voting rules can also turn the goal of a “fair reflection” into a distorted funhouse mirror. To earn delegates, a candidate must exceed 15 percent of votes; all others are shut out. In caucus states like Iowa, backers of candidates below this threshold can move to a backup second choice to make their vote count. But “single choice voting” allows no backups. With a crowded field, more than half the vote easily could be cast for candidates below the threshold; it’s even possible that no candidate would qualify for delegates in some states. Expect finger-pointing among like-minded voters splitting the vote, tied to factors like shared ethnicity (African American Sens. Cory BookerCory Anthony BookerHarris, Booker call for judgement on Jussie Smollett case to be withheld until investigation is completed Barack, Michelle Obama expected to refrain from endorsing in 2020 Dem primary: report Jussie Smollett case shows media villainizing Trump and his supporters, without proof — again MORE and Kamala HarrisKamala Devi HarrisHarris, Booker call for judgement on Jussie Smollett case to be withheld until investigation is completed Harris calls idea of Trump trusting Putin over US intel ‘height of irresponsibility and shameful’ Barack, Michelle Obama expected to refrain from endorsing in 2020 Dem primary: report MORE), ideology (progressive Sens. Elizabeth WarrenElizabeth Ann WarrenWarren set to announce plan for universal child care: reports Barack, Michelle Obama expected to refrain from endorsing in 2020 Dem primary: report Booker seeks dialogue about race as he kicks off 2020 campaign MORE, Sherrod BrownSherrod Campbell BrownSmaller tax refunds put GOP on defensive Democrats brush off GOP 'trolling' over Green New Deal GOP Green New Deal stunt is a great deal for Democrats MORE and Bernie SandersBernard (Bernie) SandersCongress closer to forcing Trump’s hand on Saudi support Booker seeks dialogue about race as he kicks off 2020 campaign Capitalism: The known ideal MORE), and experience (several mayors may run).

Ranked choice voting (RCV) is the best way to allow greater voter choice without wasted votes and unrepresentative winners.  RCV was used successfully last year in Maine’s congressional election and has been adopted for elections in 22 American cities and counties and the national legislatures in Australia and Ireland and for most party leader elections in Canada, New Zealand and the United Kingdom.

New Hampshire and other states should pass laws to enable voters to rank their presidential choices first, second and so on. To reveal the state’s majority winner, voters’ first choices are tallied. The last-place candidate is defeated, and ballots for that candidate count for their next ranked choice. When down to instant runoff between the strongest two candidates, the winner always earns a majority of the vote. Democrats could allocate delegates fairly based on vote totals at the point when all remaining candidates exceeded 15 percent of votes. Caucus states are even easier, as it only means changing party rules and choosing among relatively inexpensive ballot-tallying options.

RCV works for all parties. It will help any party gain stronger nominees and provide more clarity about what voters really want going into conventions. Because voters’ backup choices matter, candidates with RCV tend to run more positive campaigns, seek common ground, and respect their opponents’ supporters. That means primaries will see less of the divisive rhetoric that can weaken nominees in the general election.

RCV’s experience statewide in Maine and in several of our most diverse cities demonstrates it engages new voters and invigorates democracy. Last June, more San Francisco voters cast RCV ballots for mayor than in the non-RCV races for governor and Senate. In Maine, turnout increased, and voter error was minuscule. In its seven-way Democratic primary for governor, more than three times as many voters ranked at least six candidates as ranked one, debunking concerns that ranking candidates may be difficult or time-consuming.

With voters clearly ready to rank more than one candidate in what is shaping up to be a talented field, why weaken their vote by denying them that power? States and major parties have every reason to establish ranked choice voting around the nation as a key feature of the 2020 elections.

Raskin represents Maryland’s 8 th District. Richie is President and CEO of FairVote. Eichen is Advisor for EqualCitizens.US