LOL! that's why I consistantly advocate LOW revenue tariffs in the 10~20% range.
Go much higher than that and trade will be hindered TOO MUCH, causing revenues to decline. Maximizing tariff revenue with a relatively low flat rate on all imports will permit the greatest reduction of other forms of domestic taxation.
Right ..... that is what I would consider large, way past the economy-destroying point. Make it 1/2 a percent, maybe nobody will notice.