U.S. President Donald Trump answers questions about his response to the violence, injuries and deaths at the "Unite the Right" rally in Charlottesville as he talks to the media in the lobby of Trump Tower in Manhattan, New York, U.S., August 15, 2017. REUTERS/Kevin Lamarque

WASHINGTON (Reuters) - U.S. President Donald Trump said on Twitter on Sunday that the United States was considering cutting trade to any country doing business with North Korea.

North Korea said it had tested an advanced hydrogen bomb for a long-range missile on Sunday, setting off a manmade earthquake near the test.