The unpredictable and razor-close US presidential election culminates on Tuesday with voters across the deeply divided country deciding whether Kamala Harris or Donald Trump should be sent to the White House in January. Harris, the sitting Democratic vice president, and Trump, the Republican former president who is seeking a second four-year term, spent the final frenetic weeks of the campaign making their case to voters in the seven critical states that are likely to decide the winner. Pollsters say neither of the candidates in the battleground states – Pennsylvania, Michigan, Wisconsin, Geor…