• AUD/USD opens 0.3% lower after a slump in late NYK on Trump tariffs threat

• Trump says US will place 25% tariffs on goods from Mexico, Canada

• Repeats his warning to the two countries which are top U.S. trade partners

• Trump to decide Thu night on whether to impose tariffs on oil on 2 countries

• CAD -0.6%, MXN -1%, erase gains made after Trump commerce nominee's comments

• Feb 1 deadline for China tariffs loom, stronger China tech curbs eyed

• AUD drops from 0.6238 to 0.6199 before stabilising, upside limited

• Traders in sell rally mode as RBA rate cut optimism takes hold

• Support 0.6190-0.6200, 0.6165-70, resistance 0.6255-60, 0.6280-85

• Thursday range 0.6199-0.6242
America's biggest trade partners face a nervy wait as Trump tariffs loom:

(Krishna Kumar is a Reuters market analyst. The views expressed are his own.)