U.S. trade deficits with Mexico and Japan hit the highest levels in March in almost a decade, though the nation’s trade gap overall was virtually unchanged. The deficit dipped 0.1% to $43.7 billion in March to reach a five-month low, the Commerce Department said Thursday. Economists polled by MarketWatch had forecast a $44.5 billion gap. Exports slid 0.9% to $191 billion, largely reflecting fewer shipments of pharmaceutical drugs and American-made cars. Imports edged down 0.7% to $234.7 billion.