Trump himself promised he would show up with a metaphoric magic wand, and that he would bring prices down on day one.
https://nypost.com/2024/08/15/us-news/trump-blasts-kamala-harris-high-grocery-prices-and-maduro-plan-while-standing-in-front-of-cheerios-meat/
“So when I win, I will immediately bring prices down, starting on day one. We will end Kamala’s war on American energy, and we will drill baby drill. We’re going to drill, baby drill that’s going to bring down prices of everything, because energy brought it up,” Trump went on.
Also:
https://www.newsmax.com/newsfront/donald-trump-rally-north-carolina/2024/09/21/id/1181213/
"Groceries and rent will no longer break your budgets, and you will have thousands of dollars of savings by the end of the year," said Trump. "We're going to get your energy costs down in one year. We're going to get your energy costs down by 50%. We'll cut it in half. We're going to cut it in half. It means young people will once again be able to afford a mortgage and a home."