Health problems have already dogged the chamber: “Patrick Leahy, 81, Democrat of Vermont, was briefly hospitalized in January. Thom Tillis, 60, a North Carolina Republican, underwent cancer treatment. Questions have been raised about the health of Dianne Feinstein, 87, a Democrat who has represented California since 1992. Vermont’s other senator, Bernie Sanders, 79, had a heart attack in 2019,” the Times’s Ian Prasad Philbrick writes.