David Remnick: “Biden has rightly asserted that the voters regard this election not only as a debate about global affairs, the environment, civil rights, women’s rights, and other matters of policy but as a referendum on democracy itself. For him to remain the Democratic candidate, the central actor in that referendum, would be an act not only of self-delusion but of national endangerment.” “To refuse to do so, to go on contending that his good days are more plentiful than the bad, to ignore the inevitability of time and aging, doesn’t merely risk his legacy—it risks the election and, most important, puts in peril the very issues and principles that Biden has framed as central to his Presidency and essential to the future.”