Voters in the United States cast their ballots on Tuesday in an unpredictable and razor-close presidential election that will decide whether Kamala Harris or Donald Trump should be sent to the White House in January. Polling stations in eastern states including New York opened at 6 am (1100 GMT), and hour by hour citizens in more states were able to vote. 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…