Teresa Heinz Kerry, through a network of investments in blue-chip corporations, venture capital funds and municipal bonds, controls a family fortune worth an estimated $1 billion, an analysis of public records shows. The $1 billion figure is double the estimates of her wealth that are widely cited in news stories about her husband, Sen. John F. Kerry, the presumptive Democratic nominee for president. The couple would rank as the wealthiest to occupy the White House, far surpassing such storied presidential fortunes as the Kennedys'. Their assets are so vast and far-reaching that they mirror the U.S. economy and will probably...