Former President Donald Trump's return to the White House could mean tougher enforcement of U.S. oil sanctions against Iran, potentially trimming global supplies, but his administration could struggle to get China,

China's imports of cheap Iranian oil may be squeezed if Trump ramps up enforcement of sanctions on Tehran after his election win Wednesday.

Back in 2019, Trump led the US in a so-called maximum pressure campaign designed to choke off the Islamic Republic’s exports and, with it, Tehran’s access to petrodollars. Under Joe Biden’s leadership, however, flows have boomed again with an emphasis on policies that cause friction to Iran’s shipments but don’t curtail them.