Vietnam’s leadership was caught off guard by US President Donald Trump’s announcement last week that it agreed to a 20% tariff, and the Southeast Asian nation is still seeking to lower the rate, according to people familiar with the matter.

Vietnam, whose exports to the U.S. reportedly comprised 30% of its gross domestic product last year, is especially vulnerable to Trump’s tariffs.

For many countries, the reprieve from President Donald Trump’s eye-watering tariffs, which were implemented on April 2 and temporarily reduced to 10% a week later, is soon set to come to an end. The 90-day pause,