Frank Lautenberg
Frank R. Lautenberg (D-N.J.), who died on June 3 at age 89 in New York City, was the oldest sitting member of the Senate by a decade - California Democrat Dianne Feinstein, who turns 80 in a few weeks, now takes his place - and the last remaining veteran of World War II. (Here's a Wikipedia list…
Even the exit of a crop of senators born before World War II doesn't seem to be having much effect on the average age in the U.S. Senate, the Washington Post reports.