Donald Trump rocked a packed Madison Square Garden on Sunday night with nine days left of the presidential election campaign.

The former president took the stage in deep blue New York City after being introduced by his wife and former first lady Melania Trump in her first rally appearance of the race.

The Republican nominee said it would be an 'honor' to win New York and warned that voting for Kamala Harris is a 'gamble' that could 'cost millions of lives' and lead to 'World War Three'. 

Trump's speech at the end of the five-hour MAGA marathon touched on his promise to crack down on illegal immigration and introduced a tax credit for family caregivers. 

J.D. Vance, Dr. Phil, Hulk Hogan, Dana White, Tucker Carlson and members of the Trump family addressed the 20,000 capacity arena and railed against Kamala Harris' polices.

One of the first speakers podcaster Tony Hinchcliffe sparked fury by calling Puerto Rico a 'floating island of garbage' and another Trump guest called Harris the 'Antichrist'.

MAGA fans lined up in their thousands overnight to listen to the Republican nominee make his final pitch to voters in what could be one of the closest elections in decades.

Meanwhile Harris campaigned in Pennsylvania, the state that could ultimately decide who takes the keys to the White House. The election is still a dead heat, with Harris and Trump deadlocked in the polls nationwide.