Stacked bar chart showing spending on current ads and future reservations by top Senate super PACs from October 23 to November 5, 2024 (as of October 23). The Senate Majority PAC (for Democrats) and the Senate Leadership Fund (for the GOP) spent the most ad dollars in Ohio, Pennsylvania, and Michigan. Among the top 9 states, Democrats spent $57m while Republicans spent $51m, with $23m spent in Ohio alone.