Didn't Churchill suffer from crippling depression?
Yes he did.
So did Abraham Lincoln---he fought depression most of his life.
Both John F. Kennedy and Richard Nixon were prescribed psychotropic medication when they ran against
each other in 1960 . . . and both took huge pains to keep it from leaking out. (Once, when Kennedy's
special satchel of medications turned up missing, his aides panicked fearing what the opposition would
make of it.)
Franklin Pierce was traumatised by the deaths of several of his children.
Calvin Coolidge may have been a clinical depressive and blamed his political ambitions for the death
of his young son.
John Adams is often speculated to have been what we'd now call bipolar.
Lyndon Johnson's aides feared he was either a paranoiac or manic-depressive.