One plank of former President Donald Trump’s 2024 campaign is lowering prices for gas and groceries, which remains a top concern of most American voters. But at least one economic expert is doubtful that Trump’s policies would do anything to make goods more affordable — in fact, he says prices will likely jump even higher under a second Trump administration. Trump has argued that he plans to “knock the hell out of the inflation” if sent back to the White House, mainly through a combination of extending his tax cuts for corporations and the wealthy, gutting regulations and slashing government s…