How do you "hold space" for other people's emotions without hiding your own?

I'm realizing this in the context of the election but it affects my relationship all the time.

My husband emotes much more strongly than me, I can practically see a bad mood emanating from him. (It's hard to tell exactly what the emotion is but I can see it's bad). I, on the other hand, don't outwardly show much so he can't necessarily tell how I'm feeling if I don't say. On top of that, I must've learned that expressing negative emotions is rude or something because I feel guilty doing it.

So, whenever something negatively affects both of us, I immediately become the carer and basically block out all my own emotions, try to find the good in the situation, etc, while my husband moans and mopes. This makes us both feel alone because he feels like I don't care enough and I feel like I don't have space to have my own emotions because I don't want to feed into his negative emotions.

It basically amounts to whenever something bad happens it feels like it's driving a wedge between us instead of building our relationship stronger. We recover, but during the bad time I feel so much like we are not in it together and I don't know how to bridge the gap.