The legal battles over voting that could swing the US election

Rulings in Pennsylvania, Michigan and Wisconsin have eased mail-in voting restrictions but higher courts could yet intervene

America is less than a month away from election day, but high-stakes fights over access to the ballot have been moving through US courts for months. Democrats and civil rights groups have sought to ease restrictions on voting by mail amid the Covid-19 pandemic, while Republicans and the Trump campaign have sought to keep them in place.

In recent weeks, courts in Pennsylvania, Michigan and Wisconsin, all key battleground states, have issued hugely consequential rulings that could decide whether tens of thousands more votes are counted in November. Those three states will probably help decide who wins the election and Trump won each by less than one percentage point in 2016.

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