Robert F Kennedy Jr has suspended his presidential campaign and endorsed Donald Trump, in part because he did not want to be a spoiler across competitive swing states. The third-party “spoiler problem”, unfortunately, will not vanish with him.

Three committed independents and third-party nominees remain: progressive activist Cornel West, Libertarian Chase Oliver, and Jill Stein of the Green party. They could still tip the balance: the White House looks likely to be won by the tiniest margins across just seven swing states, just as it was in 2016 and 2020.

The next president should not be decided by whether Stein earns 0.4% in Michigan or 0.2%, or if Oliver claims 1.1% or 0.8% in Libertarian-friendly Georgia and Arizona. But under our current system, that’s very much possible.

We need a modern fix that recognizes that third parties are here to stay, but also that a nation with a guiding principle of majority rule deserves winners who earn more than 50% of their fellow Americans’ votes. The best solution to the urgent “spoiler” problem – which we’ve been exhaustingly debating since Ross Perot’s run in 1992 – is ranked-choice voting (RCV).

Two states – Maine and Alaska – have........

© The Guardian