The "race that hadn't crossed your radar before" is the best answer to the question, "where will my donation (of money, time, etc) have the greatest impact. Especially now.
Let’s do all of this. Please, go to the article and the listings, find a race that hadn’t crossed your radar before, and do something to help them out; a donation (if you can), volunteer for them, text a friend who lives there about the candidate, post about them on social media. Talk with people.