Subject: Re: Tariffs - $600 billion
U.S. imports of goods constituted about $3 trillion per year under current trade policy. For a new tariff scheme to yield an increase of $600 billion in revenue, that would have to be an effective 20% tariff on every good from every country, on average. Some might be higher or lower, but the overall rate of the new tariff would have to work out to 20% across all imports.

It would be even higher than 20%, because the tariff would inherently reduce that $3T trade amount significantly.