crucial debate between vice president KLA Harris and former president Donald Trump their first and perhaps only Showdown before voters heads to the polls in November campaign sources tell NBC News Harris and her team are focusing on ways to try to needle Trump to provoke him saying that she has studied past debate clips of trump she has a big task ahead of her a key challenge for Harris is trying to present herself as the candidate of change a new Sienna poll shows 61% of likely voters want a major change from President Biden 51% of those voters say Trump will bring that change but only 25% say Harris will meanwhile former president Trump spent time at Mara Lago doing what sources describe as informal debate prep a crucial challenge for Trump is winning back more Women Voters this will be Trump's seventh general election debate Harris's first and it could be their only Showdown the two have never met but since Trump left town before President Biden's inauguration