The 10 longest-serving senators currently in office
Unlike the White House, where US presidents can serve only two terms, members of Congress have no term limits.
The United States Senate has no term limits, allowing some members to serve for decades. Currently, the ten longest-serving senators have held office for varying durations. The longest-serving senator is Sen. Chuck Grassley, 93, who has spent 45 years in the Senate. Another, Sen. Susan Collins, 73, is running for her sixth term in the upcoming midterm elections.
On average, US senators are getting older, with the median age in the 119th Congress being 64, up from 61 in the 113th Congress. Of the ten longest-serving senators, two are seeking reelection in the 2026 midterms. These include Sen. Maria Cantwell, 68, and Sen. Chuck Schumer, 75.
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