From Slate.

“Iowa Sen. Chuck Grassley was first elected to political office in 1958, midway through the second term of President Dwight Eisenhower. I learned this fact earlier this year and have thought about it every day since. At 88, he is the oldest Republican senator, and second-oldest overall by a few months (to California Sen. Dianne Feinstein), in the oldest Senate in American history. He will turn 89 shortly before the 2022 midterms, in which, as he announced on Friday morning, he will seek reelection yet again. If he wins, which he probably will, his six-year term will end when he is 95.”

Who will be the first centenarian member of Congress?