John Tester Donatekart. Jon tester (born august 21, 1956, havre, montana, u.s.) is an american politician who was elected as a democrat to the u.s. Read more on the 2023 lcv scorecard.

Jon tester (d, montana) has a lifetime environmental score of 89% and scored 75% in 2023. Tester is in an intense battle to hold onto his u.s.