Other administration officials have said they are considering secondary sanctions targeting Chinese banks and companies with ties to North Korea.
He was salutatorian of his 2013 Wyoming High School class before attending the University of Virginia.
The Trump administration is considering banning travel by USA citizens to North Korea, officials said Tuesday, as outrage grew over the death of American student Otto Warmbier and President Donald Trump declared it a "total disgrace".
"I have great confidence that China will properly deal with North Korea".
"I believe it's going to set back any serious discussion about a diplomatic dialogue until this is cleared up", former governor Bill Richardson of New Mexico, an expert on North Korea who has helped extricate Americans held there, said of Warmbier's death.
The Ohio coroner's office said on Tuesday that it had not been able to determine the cause of Warmbier's death after carrying out an external examination.
But the trip made last week by Joseph Y. Yun, the top USA envoy on North Korea, was starkly different.More news: Gunman acted alone in shooting of congressman
After their son's death, Otto's parents, Fred and Cindy Warmbier, released a statement. "I am anxious about other detainees, what they go through", he said.
Warmbier died in OH yesterday [Macau time], days after being released by North Korea.
"Dennis Rodman's complacency and coddling of Kim Jong-un romanticizes and makes light of how unsafe North Korea is to its own people and Americans who travel there".
The regime claims that after just a month in captivity, Warmbier contracted botulism, was given a pill, and fell into a coma for the remainder of his 17-month stay. Top diplomats and defense chiefs from the two superpowers, including U.S. Secretary of State Rex Tillerson and Chinese State Councilor Yang Jiechi, agreed to push for a denuclearized Korean peninsula.
President Donald Trump says that he appreciates China's efforts to exert pressure on North Korea, but "it has not worked out".
Senate Armed Services Committee Chairman John McCain, R-Ariz., left, conferred with Sen.
The tour operator said that it was denied any opportunity to meet with Warmbier after his detention, and that the way it was handled was "appalling".
Why? To make a political point, to show the USA that this is what you get if you mess with North Korea.
North Korea conducts about 90 percent of its trade through China.