Port officials say the tariffs roller coaster is behind the increase at the largest port complex in the nation.

Port of LA recorded its busiest June in history, handling 892,340 twenty-foot equivalent units (TEUs), an 8% increase over the same month last year.

Port of L.A. officials say import traffic was up 32% in June compared to the month prior. They say it’s the rollercoaster effect of President Donald Trump’s on again, off again tariffs.