As the Republicans try to hold their majority, the Senate Leadership Fund is diverting resources to Kansas, which has become a growing concern for the party.

© Kenny Holston/The New York Times

The Senate Leadership Fund is diverting money to Kansas, which has become a growing concern for the party as it seeks to hold its majority.

© Kenny Holston/The New York Times

Timothy Mellon, one of the party’s biggest donors in 2024, has so far withheld his midterm donations for Republican senators because he is unhappy about the failure to pass a key Trump priority.

© Associated Press