My kids have AL medicaid, my fiance (their dad) and i live together, i didnt work much this year and if he claims them will it effect their eligibility?

My kids 3 years and a 6 month old have alabama medicaid. I'm not married to their father but we are engaged and live together and are planning to get married in the next coming months. I only worked for 2 weeks out of this year and only made under about 400 dollars. My fiance made about 70k this year. Would it be better for him to claim our kids? And if so would this effect our kids being on medicaid?