Ex wife already garnishes my unemployment - now I'm on disability - can she garnish that also?

Private disability? SS Disabiity?

911 first responder recently diagnosed with cancer - ex-wife already garnishes 3/4 of his unemployment - can she now garnish his disability while he's going through chemo & bone marrow transplant surgery?

She can't garnish anything. However, with a proper judgment and writ of execution she may be able to serve the agency that is paying out your disability.