I have no doubt that President Trump will consult with the ROK government before any preemptive strike on North Korea, the real question is how long before any strike will he consult and what influence will the ROK have on the decision?:
The U.S. Donald Trump administration must have prior consultation with Seoul before taking any confrontational actions concerning North Korea, including launching a preemptive strike, South Korean politicians said.
The politicians, including presidential candidate Moon Jae-in of the Democratic Party of Korea (DPK), said Seoul is directly involved in the North Korean issue, noting that any actions taken by Washington will have a direct impact on the Korean Peninsula. (…….)
“South Korea should be the owner of North Korean issues and take the lead in dealing with them rather than letting neighboring countries such as the U.S. and China manage them,” Moon told reporters, Saturday, referring to the outcome of the summit talks between Trump and Chinese President Xi Jinping.
“The U.S. is talking about various possibilities regarding its confrontational actions on the North. The U.S. must consult with South Korea before whatever measure it takes,” he said. [Korea Times]
You can read more at the link.