How could that possibly be the most important political issue?
I am very sympathetic to the idea of voting just for Ross. It is unclear to me which candidate would be better, since neither of them are close to my political beliefs at all. It is a deadlock and I seem completely unrepresented. The consequences of voting based on any big issues I care about seems completely unpredictable; politics is a game of lies, smoke and mirrors. So I would perhaps rather vote for the candidate that would definitely save one person's life that is important to me.
Unless it's your day job: never try to unpack the priorities of a voter. You'll just get sad.
(For consideration on this topic: https://press.princeton.edu/books/paperback/9780691138732/th...)