Maine Senate Race Is Most Expensive Per Voter—Where Is the Money Coming From?
Summary
The 2026 Maine Senate race between incumbent Senator Susan Collins and challenger Troy Jackson is the most expensive Senate race per voter in the U.S., with heavy spending from both Republican and Democratic groups. Much of the funding for Collins comes from Republican super PACs and wealthy donors, while Jackson's campaign has substantial but smaller outside support.Key Facts
- Over $195 million has been spent on advertising for the Maine Senate race.
- Republicans have spent about $97 per adult voter; Democrats have spent about $70 per adult voter in Maine.
- Major Republican supporters for Collins include the Senate Leadership Fund super PAC and Pine Tree Results PAC.
- Dozens of billionaires have donated nearly $10 million to support Collins since 2025.
- Troy Jackson’s campaign has not yet filed a financial disclosure report but has received around $19.8 million from the Democratic-aligned super PAC WinSenate.
- Nationwide, over $1.6 billion has been spent on Senate race advertising in 2026, led by Ohio and Texas.
- A mistaken ad run by a Republican super PAC against Jackson was placed in the wrong city but was quickly corrected.
- Maine’s Senate race spending per voter far exceeds other close races like Alaska and Iowa.
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