Kamala Harris and Donald Trump began a frantic last push across US swing states Sunday, with less than 48 hours of campaigning left to secure a decisive edge in a bitterly fought and historically close presidential election. Over 75 million people have cast early ballots ahead of Tuesday's climax. The race is down to the wire - with more states functionally tied in polls at this point than in any comparable election. Above, US Vice President and Democratic presidential candidate Kamala Harris (L) walks on stage as she arrives for a campaign rally at the Craig Ranch Amphitheater in Las Vegas, Nevada and Republican presidential candidate and former US President Donald Trump gestures at supporters as he walks on stage during a campaign rally at the Sports and Expo Center at the Macomb Community College in Warren, Michigan.