California Sen. Dianne Feinstein and House Minority Leader Nancy Pelosi are among the 15 wealthiest members of Congress, according to a new survey. The annual rankings by Roll Call, a Capitol Hill newspaper, showed the two San Francisco Democrats have a combined worth of at least $68 million, and potentially much more. Rep. Michael McCaul, R-Texas, tops the list with a minimum net worth of $306 million, roughly 4,000 times greater than the average American household. His wife, Linda, is the daughter of Lowry Mays, founder and CEO of Clear Channel Communications. No. 3 on the list, Rep. Darrell Issa,...