 Consumer spending grew just 1.5%, down from an initial estimate of 2%, in a sign that high interest rates may be taking a toll on the economy. Still, the reports show that the January to March slowdown was caused mainly by two factors, a surge in imports and a drop in business inventory. Correspondent Jeremy House, the average rate on a 30-year mortgage eased again this week, extending the welcome trend for prospective homebuyers facing those record high home prices.