"There is the realization that if China does cut off all transactions with North Korea, we'll be in a position where once again the dictator will not be able to pay his generals, " Rep. Edward R. Royce, R-Calif., chairman of the House Foreign Affairs Committee, said on CNN's "State of the Union".
Earlier, US Secretary of State Rex Tillerson and China's top diplomat, Mr Yang Jiechi, exchanged views on the "situation on the Korean peninsula" by phone yesterday, China's official Xinhua news agency said.
The launch was conducted only nine hours before U.S. Vice President Mike Pence arrived on his first trip to South Korea.
Pence also used his visit to South Korea to emphasise the unwavering U.S. commitment to protecting "freedom" on the peninsula. North Korea might recognize that those actions would cross the red line and bring about a US strike.
None of his travels have been West of the MS or outside the United States.
North Korea has spent decades trying to develop operational nuclear weapons.
Hightened tensions on Korean Peninsula following failed DPRK missile testTensions are flaring on the Korean Peninsula following the latest missile test by the Democratic People's Republic of Korea.
There was a high degree of confidence it was not an intercontinental ballistic missile, a US official said on condition of anonymity. They can stop this if they want to due to their control over the North Korean economy, " Sen.
U.S. President Donald Trump has employed tough rhetoric in response to North Korea's recent missile tests, but the new president's options appear limited in dealing with a challenge that has vexed his Oval Office predecessors.
"We had good intelligence before the launch and good intelligence after the launch", the adviser said on condition of anonymity.More news: US 'working with China' over North Korea
If Sunday's missile launch leads to a nuclear test or an ICBM launch, there would be "a powerful punishing measure that North Korean authority can't endure", South Korean officials said.
But the president's tweet indicated an openness to USA intervention if China doesn't deal with the nuclear threat posed by the isolated country. Those countries, too, have told the new U.S. leadership they are equally fed up with North Korea's continued military build-up.
After the Republic of Korea, Pence will travel to Japan where the DPRK's accelerated nuclear missile program is also expected to be high on the agenda.
Lt-Gen McMaster made a point of stating several times that China - North Korea's key ally - is now concerned about the reclusive communist state's behaviour.
Speaking to a parliamentary session Monday following North Korea's massive military parade and botched missile launch, Abe said: "Needless to say, diplomatic effort is important to maintain peace".
The North Korean missile "blew up nearly immediately" after its test launch on Sunday, the US Pacific Command said. It follows another failed test.
He said the president had asked the national security council to integrate the efforts of the Defence and State departments and USA intelligence agencies to develop options if "this pattern of behaviour continues and if the North Korean regime refuses to denuclearise". The country has also conducted five nuclear tests, including two in the previous year. He added that the North Korean leader's unpredictability complicated U.S. strategy.
The potential for North Korean retaliation against South Korea adds up to far more devastation than the anger and threat of recriminations from Syria's military patron, Russia.
Vice President Pence warned North Korea Monday the "era of strategic patience is over", expressing impatience with the speed and willingness of the regime to ending its nuclear weapons program.