Kamala Harris rallied supporters in the swing state of Wisconsin on Thursday, October 17 while Donald Trump stirred controversy with criticism of embattled ally Ukraine, as the rivals vied for the remaining undecided voters in a deadlocked US presidential election. The candidates are racing toward Election Day on November 5 with the Democratic vice president narrowly leading her Republican rival nationally and in several crucial swing states, although most polls are within the margin of error. Both are also deploying high-profile surrogates to sew up support in the race's final weeks, including billionaire Elon Musk's series of appearances for Trump in must-win Pennsylvania. Halloween: Were do the stories come from? Witches, Warlocks and the spirits