Trump's biggest first-term trade impact was to shatter decades of political consensus favoring ever-lower trade barriers.

When President-elect Donald Trump recently floated the idea of annexing Canada, a key reason he gave was a claim that the United States was “losing $200 billion a year” to its northern neighbor.

Emboldened by voter support and past legal wins, the new administration intends to move aggressively and push the limits of presidential authority, while softening some campaign rhetoric.