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 TrumpTrump nominates ambassador to Turkey Trump heads to Mar-a-Lago after signing bill to avert shutdown CNN, MSNBC to air ad turned down by Fox over Nazi imagery 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 RubioOn 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 Trump declares national emergency at border Democrats veer left as Trump cements hold on Republicans MORE (R-Fla.) and Ted CruzRafael (Ted) Edward CruzPoll shows competitive matchup if O’Rourke ran for Senate again Democrats veer left as Trump cements hold on Republicans O’Rourke heading to Wisconsin amid 2020 speculation 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 BookerNewsom endorses Kamala Harris for president Trump tweets video mocking Dems not cheering during State of the Union Former Virginia Gov McAuliffe writes book about confronting white nationalism MORE and Kamala HarrisKamala Devi HarrisNewsom endorses Kamala Harris for president Constitutional conservatives need to oppose the national emergency Overnight Health Care — Sponsored by America's 340B Hospitals — Dems blast rulemaking on family planning program | Facebook may remove anti-vaccine content | Medicare proposes coverage for new cancer treatment MORE), ideology (progressive Sens. Elizabeth WarrenElizabeth Ann WarrenNewsom endorses Kamala Harris for president Constitutional conservatives need to oppose the national emergency Poll: Sanders, Biden seen as most popular second choices in Dem primary MORE, Sherrod BrownSherrod Campbell BrownPollster says current 2020 surveys like picking best picture Oscar before movies come out Shep Smith: Signing funding bill is a 'loss' for Trump no matter how it's packaged Exclusive: Biden almost certain to enter 2020 race MORE and Bernie SandersBernard (Bernie) SandersNewsom endorses Kamala Harris for president Business, conservative groups slam Trump’s national emergency declaration Poll: Sanders, Biden seen as most popular second choices in Dem primary 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