Wall Street Journal: “Rahm Emanuel has long been exercise-obsessed, swimming 3 to 4 miles a week, plus weight training, machine workouts and yoga. He put his vitality forward in a more public way over the weekend as he biked across a state vying to hold the first 2028 Democratic presidential nominating contest.” “The 66-year-old Democrat is likely to be one of the oldest—if not the oldest—in the field from either party if he enters the race. The…