The president submits a budget proposal to Congress in _____.

The timing of the president's budget proposal to Congress is established by law: the president must submit the budget for the upcoming fiscal year no later than the first Monday in February. This requirement means that the proposal typically occurs in late January or early February. The budget is a crucial document as it outlines the administration’s spending priorities and economic policy objectives, setting the stage for congressional discussions and negotiations.

In contrast, other options suggest timelines that do not align with the statutory deadlines for budget submission, making them less relevant. For example, March or April typically falls after the deadline, mid to late June is well into the fiscal year, and September to October is when Congress is usually finalizing appropriations based on the previously submitted budget. Understanding this timeline is essential for comprehending the budgetary process and the broader legislative calendar.