RecruitingPhase 2Radiation therapyThe Miami "EMPIRE" Trial - Eradication of Metastatic Pancreatic Cancer With Immuno-RadiationThe purpose of this study is to assess if radiation therapy (which uses high-energy radiation to damage or destroy cancer cells) combined with immune checkpoint inhibitors (medications that helps the body recognize and attack cancer cells) will be beneficial for patients with metastatic pancreatic ductal adenocarcinoma.