Final answer:
The review of executive branch communications to Congress by the OMB is known as OMB clearance, ensuring alignment with the president's policies.
Step-by-step explanation:
The review of all executive branch testimony, reports, and draft legislation by the Office of Management and Budget (OMB) to ensure that each communication to Congress is in accordance with the president's program is called OMB clearance. The OMB has numerous responsibilities, including producing the president's annual budget, overseeing executive department actions, and coordinating and reviewing federal regulations. It also has a significant role in legislative oversight to ensure that executive communications with Congress align with the president's policy preferences and objectives. This function operates within the broader context of checks and balances and legislative oversight of the executive branch, used to maintain the balance of power among the branches of government.