Trump still needs to win the general election, and getting his points out there about being pro coal, anti-global warming and pro industry should be winning ideas with conservatives and in other mineral-rich states.
Makes sense to visit the various states and focus on what might seem like specific to that state - but is relevant in many states, or just gets a certain message out.
This pro-coal message is one I can get behind.
It is like coal is attacked for the ideology rather than the science of it - maybe it reminds the left of the "old world" of the industrialization they hate - I don't know.
The animosity against coal is puzzling. All I can think of is that coal is so cheap and plentiful that it makes the expensive so called "green" alternatives not viable so they attack coal and even attempts to modernize coal into a "cleaner" fuel is attacked.