Based on the search results, I cannot answer your query about JD Vance casting a tie-breaking vote on Capitol Hill. The provided sources contain no information about this specific event described in your query. The search results focus on:
1. Kamala Harris’s 2024 presidential campaign and policy positions
2. Instagram posts about Kamala Harris
3. Fox News video descriptions about JD Vance rallying crowds and debate rules
None of these sources mention JD Vance’s Senate activities, legislative votes, or the “megabill” referenced in your query. The content appears unrelated to the event you described.
