LBJ’s family history basically has all the men in the family dropping dead of heart attacks in their 60s. That’s why he quit smoking—and LBJ loved smoking—in the 1950s cold so he would live to be President, IIRC he had less than a pack of smokes from when he quit until he retired.I remember reading he commissioned an actuarial study on when he would die that told him he wouldnt live through a second term, and so his reason for not running again was mainly health.
LBJ always had health problems when things went wrong. If he’s on a success roll I feel his health will not be a problem.