Members of Congress often use weekend plane trips back to their districts as a way to unwind after a hectic bout of lawmaking. Which could explain why Rep. Sheila Jackson Lee (D-Texas) demanded a whole row of seats to herself on a recent Continental flight from Washington to Houston. Jackson Lee usually gets first-class upgrades from the airline. But on this particular flight first class was full. After cabin attendants delivered the bad news and showed her to the coach section, Jackson Lee exploded, said one witness. “When she saw that she had to sit with other people, she started...