I suspect Trump is in ND to give his energy policy speech because ND is booming due to the Baaken Shale play. This is the largest US oil development in the past 40 years and has made ND is second to Texas in terms of oil production and the lowest unemployment rate in the country at 3.1%.
ND is one place where WINNING is happening, so it’s perfect for Trump!
I think you’re right. Also, I read earlier that one of the Congressman from ND is his energy advisor and asked him to come.