As U.S. secretary of agriculture Brooke Rollins took the stage at the Commodity Classic in Denver about 2,500 farmers inside the Colorado Convention Centre leapt out of their seats and gave her a standing ovation.

Tariffs will go ahead on March 4, White House officials say
Congress not briefed for weeks, reports withheld, meetings cancelled, reports suggest
Federal goverment to impose tariffs on Feb. 4