come back (in)to the fold

To begin participating in, belonging to, or supporting some group, activity, or field that one left for a period of time in the past. After stepping away from politics for nearly ten years, the former governor is coming back to the fold with his bid for the presidency. Danielson stated that she would be coming back into the fold as the new head coach of her alma mater's rugby team. The company plans on having the former CEO come back into the fold as an advisor.