Americans are facing higher costs. Trump was elected on promises to lower prices for inflation-weary consumers and high inflation could imperil his agenda.

The Consumer Price Index for All Urban Consumers increased 0.5% on a seasonally adjusted basis in January, after rising 0.4% in December, the U.S. Bureau of Labor Statistics reported today.

US 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.