The grandson of the 10th President of the United States, John Tyler, has died at 96 — 180 years after his grandfather was last in the White House. Harrison Ruffin Tyler, the son of President Tyler’s 13th child, Lyon Gardiner Tyler, died on Sunday evening at a Virginia nursing home, ending the last living link to an 18th-century presidential administration. When he was born on Nov. 9, 1928, his father was 75 years old. Having children into old age was a family trait, as President Tyler was 63 when Lyon was born. President Tyler would go on to have two...