Donald Trump is diagnosed with cancer at some point in his Presidency. How does this affect the public's view of him or his policies?

Cancer is a universally hated disease of which the hate transcends party lines. Would a polarizing President being diagnosed with the disease lead the opposition to feel for him? Similarly, would this lead the start to an open War on Cancer, even if it goes against the anti-science attitudes of his administration.

How would the US and the world react to a President having cancer in-office?