Republican organisations have spent over $740 million on U.S. congressional races since Labor Day, with significant contributions from groups aligned with President Donald Trump and billionaire Elon Musk. Despite this surge in spending, several competitive Senate races show little change ahead of the November 3 midterm elections.
CNBC’s analysis of AdImpact data reveals that Trump-aligned groups accounted for at least $220 million in spending, while Musk contributed more than $276 million to Republican organisations since July. Despite this financial edge, Democrats maintain leads in several close races, influenced by economic concerns, Trump’s unpopularity, and the effects of the Iran war.
High television advertising costs have diminished the impact of Republican spending. Outside political groups often pay more for airtime than candidates, and repeated negative advertisements have resulted in minimal shifts in voter sentiment. For example, in Texas, Democrat James Talarico holds a 48% to 44% lead over Republican Ken Paxton in a Siena College poll, despite over $113 million spent on negative ads targeting him.
The spending approach has increasingly focused on defending Republican-held seats. Party organisations have allocated additional resources to Texas, Kansas, and Nebraska, while reducing advertising commitments in North Carolina and several competitive House districts. This shift reflects mounting pressure to protect existing seats rather than pursue new ones.
Although Republican operatives contend that the financial support has helped vulnerable candidates stay competitive, limited polling movement underscores the difficulty of converting campaign spending into voter support. With Election Day approaching, the effectiveness of the GOP’s spending strategy remains uncertain.
