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The bitterly contested US presidential election is just 11 days away, although many Americans are already casting ballots by mail and at select polling places. National polls give Democratic challenger Joe Biden a moderate lead. But scientists seem to overwhelmingly want the former vice-president as the next US leader, according to a Nature survey of nearly 900 readers. They identified climate change and the US response to the COVID-19 pandemic as the main issues that have influenced who they support in this election.