Highly ironic, but not really, because they're getting the government they voted for.
Furthermore, it's densely populated cities which are the most likely to suffer casualties, and cities tend to vote more Democratic. On the other hand, Florida (a key battleground state) has a lot of older people and tends to lean Republican, as do older people on the whole.
Trump also doesn't seem to have the most inspiring Democratic opponent in the form of Biden. On the other hand Trump has himself been abysmally unpopular.
Something else to consider is that all the Presidential candidates and the President himself are old enough to be in the high risk category for succumbing to this illness, so it's quite possible that one or more of them won't even make it to November, which would throw the election in to chaos.
On the balance, both parties have their work cut out for them if they want to win in November. It could go either way.
Or, to put it another way, somebody 60 and under who catches it has about a 0.06% chance of dying, while somebody over 60 has about a 1.94% chance of dying.
Of course, this is before considering the effects of overloaded hospitals, which would be likely to skew those numbers, as younger people would have a better chance of surviving without proper medical care than older people.
Here's Wuhan's data: https://i.ibb.co/983SC13/covplot.png
This is not a particularly useful thing to say. Incumbents rarely lose anyway - it's only happened 3 times since WW2. Additionally, you have incumbents like Johnson who was so unpopular that he lost his parties' primary contest.
I don't think this is a "rally behind the flag" moment, especially because the President isn't invoking the language of national identity to get people to respond to the crisis. That could change, but it won't be super effective at this point.