President Biden claimed in a long-winded anecdote on Monday that his great-grandfather was rumored to have been part of a group of coal miners that would kill anti-Catholic mine foremen and lay the dead bodies “on the doorstep” of their families’ homes. Vice President Kamala Harris nodded along as the 81-year-old president spun the strange yarn during his remarks to union workers in Pittsburgh, Pa., joking that he was “disappointed” to learn that his great-grandfather Edward Francis Blewitt was not a member of the “Molly Maguires.” “I remember when my great-grandfather was only the second Catholic elected statewide in the...