Democratic Senator Jon Tester, currently in his bid for a fourth term in predominantly Republican Montana, faces a pivotal race in 2024. His reelection is crucial for Democrats, who are defending three Senate seats in states won by Donald Trump in both the 2016 and 2020 elections—Ohio and West Virginia being the others. Tester is expected to confront Tim Sheehy, a former Navy Seal turned aerospace CEO, endorsed by Trump and key Republican figures.