If Republicans win control of the Senate in 2024, victory will be determined by the party identification of the President pro tempore of the Senate on February 1, 2025. The outcome after the November 5, 2024, elections is decided by the party with the most seats, or if tied and no Vice President, the party affiliation of the Majority Leader following their selection, unless they do not caucus with either party. The resolution criteria for one market states that Democrats win control if they have more than half or half of voting Senate members and a Democrat Vice President, while Republicans win under similar conditions. Ambiguous outcomes are resolved by credible reporting, final election authority certification, or other official determinations. If the Majority Leader does not caucus with either party, the market resolves 50-50.