If you can, stay and fight. Especially if you're a white US-born person. It's our mess to clean up.
When I see white folks thinking about leaving, I usually just give em space because it's often an emotional response from people who've never had to interact with any country's immigration system. They tend to work through it.
Emigration is often treated as a last resort for good reason.
Signed,
Someone who has supported multiple immigration petitions