You are a team; the two of you against the issue. Do what you can to collaborate against the issue.
Asking politely for suggestions or alternatives invites collaboration. “How might we address this? What are your thoughts about this?” Careful consideration of options shows respect to your spouse. “I didn’t it that way. Hmm. I want to think about that angle.” Show that you are willing to try something new by offering some possible alternatives. “I’m thinking that perhaps we can explore some other ways to address this. Here is what I have been thinking so far.” “There are a few ways we can address this; let’s talk this through.”