WASHINGTON (AP) — The U.S. trade deficit surged to a record $74.4 billion in March as an improving U.S. economy boosted purchases of imported foreign goods. The Commerce Department reported that the March deficit was 5.6% higher than the February gap of $70,5 billion. The trade deficit is the gap between what America buys from abroad and what it sells to other countries. Imports rose 6.3% to $274.5 billion while exports increased 6.6% to $200 billion. The U.S. imports so much more than it exports that in dollar terms, the rise in imports was greater. The politically sensitive deficit with China in goods rose 11.6% to $27.7 billion, as usual, the largest deficit with any single country.