Former President Donald Trump would likely have the authority to ramp up tariffs dramatically even without Congress, at least temporarily, if he wins the election.

Trump has vowed a historic reworking of tariff policy that would feature universal tariffs on rivals and allies alike. Experts are saying he would likely be able to do most of what he’s promised through the power of his office, although the efforts may end up being temporary and would face legal challenges that could derail them.