Hillary Clinton and Donald Trump launched a two-day campaign whirlwind in battleground states on Sunday in a frantic end to a presidential election race that highlighted shifts in the US electoral map that could decide the outcome on Tuesday.

The Clinton campaign was hoping that a surge in Latino voting would push her over the winning line in Florida, North Carolina and Nevada, while Mr Trump was betting that a heavy turnout of white, working-class voters will allow him to flip previously Democratic strongholds in the industrial midwest.

Mrs Clinton has held a lead in the polls for most of this year and appeared to have more potential paths to the 270 votes needed in the electoral college to win the White House. But surveys have shown a tightening race both nationally and in key swing states over the past two weeks, particularly after the FBI said it was examining new emails related to its investigation of the former secretary of state’s use of a private server.