I'd consider extra tariffs a bad thing due to it creating an immediate unbalance in an economy. It can destabilize an economies influx of money if their exports get taxed more. China, being a huge trader with the US, creates trade tension as well which could stray into more political issues as they both heavily rely on each other.
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I believe it is article 3 of the constitution
Economic troubles and overreliance on slave labor At the same time, the empire was rocked by a labor deficit. Rome's economy depended on slaves to till its fields and work as craftsmen, and its military might had traditionally provided a fresh influx of conquered peoples to put to work.