There's no level of tariff that would cover our expenditures even if they were significantly reduced, which isn't going to happen in the foreseeable future. As much as I dislike personal and corporate income taxes, tariff are even worse for interfering with economic efficiency. If a tariff was proposed by the Right, the Left would sign on to it and spend the money on more dubious programs.
I agree that we could not survive with just tariff revenues in this period as we did in the past. But they should not be ignored as a revenue source. In my view they are preferable to income taxes. If I had my way, we'd have a national sales tax supplemented with tariff revenue. I'm for indirect taxes. They're more honest and we were a freer people when we had them.