Schumer leads trader consensus at 47.5 percent as the presumptive next majority leader because he has publicly committed to seeking another term as Senate Democratic leader regardless of November midterm results, while internal party divisions over his tenure remain contained absent a major Democratic setback. Thune sits at 26.5 percent on expectations he will seek to retain the GOP conference chair after the midterms, with no credible challenger emerging despite earlier speculation around figures such as Scott. Potential Democratic successors including Schatz and Van Hollen, along with Republican alternatives such as Cotton and Barrasso, trail due to limited support in their respective conferences. The closely balanced odds reflect uncertainty over which party secures the majority and the outcome of post-election leadership votes.