Two months ago, Javier Barajas hosted former President Donald J. Trump at Il Toro E La Capra, one of five restaurants he owns in Las Vegas. Mr. Barajas, 65, had eagerly backed Hillary Clinton when she ran for president in 2008; he previously welcomed President Biden to one of his other restaurants. But he has thrown his support to Mr. Trump this year for one major reason: skyrocketing prices on everything from the ingredients in his entrees to the gas for his catering truck. His nephew, Justin Favela, was crafting a piece of traditional Mexican folk art from tissue paper...