Trump finds tamping down costs to be tricky

President Trump is reaching deeper into individual markets to try to ease consumer price strains. Why it matters: The administration is under mounting pressure to deliver relief as affordability becomes a bigger political liability ahead of the midterms. The push is cutting against — and sometimes rolling back — pillars of Trump's economic agenda, including tariffs and favoring domestic producers. And the moves may offer limited relief, reflecting how difficult it is for presidents to broadly…