Venetoclax, Cladribine, Low Dose Cytarabine, and Azacitidine in Treating Patients With Previously Untreated Acute Myeloid Leukemia

Inclusion Criteria: 1. Participants with previously untreated acute myeloid leukemia (AML). Prior therapy with hydroxyurea, hematopoietic growth factors, HMA, ATRA, or a total dose of cytarabine up to 2g (for emergency use for stabilization) is allowed. 2. Age \>/= 50 years. Participants aged \< 50 years who are unsuitable for standard induction therapy may be eligible after discussion with primary investigator 3. Adequate organ function as defined below: * liver function (bilirubin \< 2mg/dL, AST and/or ALT \<3 x ULN). Unless liver enzyme abnormalities are determined by the treating MD and PI to be due to leukemic infiltration. * kidney function (creatinine \< 1.5 x ULN ). 4. ECOG performance status of ≤ 2. 5. A negative urine pregnancy test is required within 1 week for all women of childbearing potential prior to enrolling on this trial. 6. Participants must have the ability to understand the requirements of the study and signed informed consent. A signed informed consent by the participants is required prior to their enrollment on the protocol. Exclusion Criteria: 1. Pregnant women are excluded from this study because the agents used in this study have the potential for teratogenic or abortifacient effects. Because there is a potential risk for adverse events in nursing infants secondary to treatment of the mother with the chemotherapy agents, breastfeeding should also be avoided. 2. Uncontrolled intercurrent illness including, but not limited to ongoing or active uncontrolled infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements. 3. Participants with documented hypersensitivity to any of the components of the chemotherapy program. 4. Men and women of childbearing potential who do not practice contraception. Women of childbearing potential and men must agree to use contraception prior to study entry and for the duration of study participation. 5. Prior therapy with venetoclax 6. Participants with a diagnosis of acute promyelocytic leukemia (AML-M3) will be excluded from this study.