The Indiana state Senate primaries have become battlegrounds for political advertising, with nearly $12 million poured into campaigns ahead of the elections. This surge is largely fueled by endorsements from former President Donald Trump, who is backing challengers against seven incumbents that voted against a redistricting plan he supported. In stark contrast, only $500,000 was spent on state Senate ads during the entire previous election cycle. The ads have been notably aggressive, with personal attacks on incumbents like State Sen. Jim Buck, who is facing his first primary challenge since 2008. Notably, a PAC supporting Trump's candidates has spent nearly $5 million, while another group linked to U.S. Sen. Jim Banks has contributed over $3 million. The incumbents have collectively spent more than $2.6 million in their efforts to retain their positions, which offer a modest salary of just over $33,000 per year.