As a result of the trade war and tariffs now active on most imports from China, the country has slipped from the U.S.' top 1 to top 3 trading partner in 2019. According to the U.S. Census Bureau, imports from plus exports to China amounted up to almost $660 billion in 2018 and were down to approximately $470 billion in 2019 as of December. Current 2019 figures for Canada and Mexico are also still lower than those of 2018, but are expected to remain above those of China for 2019.
In 2019 to date, imports and exports from Mexico stood at almost $518 billion while trade with Canada was worth $514 billion.
Exports to China decreased from $120 billion to around $87 billion in 2019. A lot of agricultural products are no longer exported to China due to the tariffs, which is putting a burden on farmers. As a retaliatory measure to the Trump administration tariffs, China stopped the import of large amounts of U.S. soybean, corn, pork and other farm products.