Nivolumab and Azacitidine With or Without Ipilimumab in Treating Patients With Refractory/Relapsed or Newly Diagnosed Acute Myeloid Leukemia

This will be a phase II, open-label, non-randomized study with a safety lead-in phase. There are 3 Arms in this study each with 2 parts. If you are eligible, you will be assigned to an Arm and a part when you join the study. In each arm, you will receive a different combination of study drugs: Arm 1: nivolumab and azacitidine, Ih Arm 2: nivolumab, azacitidine, and ipilimumab, Arm 3: nivolumab, azacitidine, and venetoclax. There are 2 parts in each arm: Part A (dose escalation) and Part B (dose expansion). The goal of Part A of this clinical research study is to find the highest tolerable dose of the study drugs (nivolumab, azacitidine, ipilimumab, and/or venetoclax) that can be given to patients with AML. The goal of Part B of this study is to learn if the dose found in Part A can help to control AML.