This joint resolution sets up the Senate's procedures for handling the impeachment trial of Homeland Security Secretary Alejandro Mayorkas after articles of impeachment were transmitted from the House. It directs that Mayorkas be formally summoned to respond in writing within 7 session days, and allows House impeachment managers to file a follow-up reply within the same timeframe. The resolution creates a 12-member bipartisan Senate committee, evenly recommended by the majority and minority leaders, to gather evidence and testimony related to the case, with a report due to the full Senate within 90 days of the committee being formed; this committee would receive funding from the Senate's contingent fund to cover staff and expenses and would dissolve 45 days after the Senate reaches a final verdict. Finally, it schedules the full Senate to convene as a Court of Impeachment 90 days after the committee is appointed to formally consider the charges. The resolution primarily affects Senate procedure and Mayorkas himself, establishing the legal and administrative framework rather than addressing the substance of the impeachment charges.