#WhiteHouseCryptoSummit Concerns have risen around the state of the U.S. economy in recent weeks, particularly as investors attempt to gauge the relative impact of President Donald Trump's tariff policies on growth.

Trump has introduced a raft of trade actions since beginning his second term in the White House in late January, slapping -- and then delaying -- levies on most goods from traditional U.S. allies Canada and Mexico. Imports from China have also been hit with fresh surcharges, while the European Union has been singled out by Trump for perceived unfair trading practices.