I can't imagine why it would. "Droughts have always happened, and this is just bad luck. Climate always changes. Climate change is a hoax designed to put family farms out of business and make us get all of our food from China."
If they've made it this far denying science, I don't see any reason why this would change anything. It's not as if a shift in climate change stance would reduce droughts this year or his decade.
Hopefully it will cause them to reconsider their position on climate change.