WASHINGTON (AP) — U.S. inflation accelerated last month as the cost of groceries and gasoline rose, a trend that will likely underscore the Federal Reserve’s resolve to delay any further interest rate cuts. The consumer price index increased 3% in January from a year ago, Wednesday’s report from the Labor Department showed, up from 2.9% the previous month. It has increased from a 3 1/2 year low of 2.4% in September. The figures underscore the stickiness of inflation, which created a major political problem for former President Joe Biden. President Donald Trump pledged to reduce prices in last year’s campaign, though most economists worry that his many proposed tariffs could at least temporarily increase costs.