Nearing the end of their Martha’s Vineyard vacation, the Obamas spent their Friday morning biking through the Manuel F. Correllus State Forest. President Obama, his wife and his two daughters all wore helmets, the pool reports. They biked about six miles on a trail called the state forest loop. The forest, filled with biking trails, covers 5,100 acres. As Sasha and Michelle rode by reporters, the pooler, Elizabeth Williamson of The Wall Street Journal, noted: “After a short break came potus in white shirt and his grey jeans looked to your pooler rather mom-like.” “Hi, guys,” Obama remarked to the...