Donald Trump's second presidential term promises a return to tariffs as he pressures partners and rivals to tackle everything from migration to drug trafficking, while protecting US industries -- in moves that could trigger new trade wars.

Even before taking office, Trump has raised the prospect of fresh levies on companies, countries and groups of states as he seeks to implement his agenda.

He has vowed tariffs on Mexico, Canada and China until they crack down on fentanyl and border crossings, and he threatened "economic force" against Ottawa after suggesting Canada should become the 51st US state.

Trump also warned of 100 percent tariffs on BRICS nations -- a bloc including Brazil, Russia, India, China and South Africa -- if they create a rival to the US dollar.

New trade wars could rock the global economy, worsen tensions with Beijing and upend ties with allies.

US manufacturers, farmers and small business owners await his first moves, girding for higher........

© International Business Times