President Donald Trump is on the verge of slapping new tariffs on Canada and Mexico while doubling a levy on China, moves that would dramatically expand his push to revive domestic manufacturing, tap new revenues and rebalance ties with the biggest US trading partners.

U.S. President Donald Trump is expected to decide on Monday what levels of tariffs he will impose early on Tuesday on Canada and Mexico amid last-minute negotiations over border security and efforts to halt the inflow of fentanyl opioids.

Mexico will wait and see if U.S. President Donald Trump goes through with his threat to slap tariffs on its southern neighbor on Tuesday, the nation's president said on Monday, adding that Mexico has back-up plans in case the tariffs go into place.