So do me a favor and hit the show as full sized image for me, it is a nightmare on a phone to look at the gallery version.
@Becky could that just automatically be defaulted to full size?
Go here as see the differences between the very common disease. I did not see stems effected but I could not see well at all so it may not be late blight. I did see insect tracks on one photo. Also it is in potted soil of some form, and that also helps preclude late blight which can come to a plant through insects biting at roots in natural soil, such as a nematode puncture. In fact insect puncture is a very common pathway for a lot of problems so learn to spray pyrethrins.
@Chuck has a brilliant sequence of organic insect fighters. The leaf drops do look like late blight but you should see other attack beside the leaves, and the plant will die quickly to boot.
The plant needs more sun, and the roots must be cooler, think about a tiny shade tent over the pot in a sunnier spot. But it should not get too hot. 90f is trouble. It melts the pollen. Not that that is a problem since I see no flowers really, so flower boosting fertilizer might help. Do not over do in a big blast rather use mild concentration but frequent spraying.
@TomatoTango lives in south Alabama and might be attuned to the temperature challenges down your way.