Unlock the US Election Countdown newsletter for freeThe stories that matter on money and politics in the race for the White HouseDonald Trump’s plan to devalue the dollar if he wins the US election looks “extremely unlikely” to succeed as it would be undermined by policies such as tariffs and tax cuts, according to investors.In recent weeks, the former president and his running mate, JD Vance, have talked up the benefits of weakening the currency to boost the country’s manufacturing and lower the trade deficit.But strategists warn that plans to...