Politico's Nahal Toosi reports Mexicans' wariness over President Trump naming immigration hardliner Stephen Miller chief of staff: power players fear U.S.–Mexico tensions will spike and that Miller could push Trump toward direct U.S. military action against cartels on Mexican soil. Sheinbaum's cooperation with Trump has kept relations stable so far, though Trump threatened to immediately double tariffs over "huge" migrant caravans, and some expect Democrats' midterm gains to temper new fights.