covering the campaign, dan balz of "the washington post," jeanne cummings of "politico," major garrett of "national journal," and jeff zeleny of "the new york times." >> award-winning reporting and analysis, covering history as it happens. live from our nation's capital, this is "washington week" with gwen ifill, produced in association with "national journal." corporate funding for "washington week" is provided by -- >> this rock has never stood still. since 1875, we've been there for our clients through good times and bad. when their needs changed, we were there to meet them. through the years, from insurance to investment management, from real estate to retirement solutions, we've developed new ideas for the financial challenges ahead. this rock has never stood still. and that's one thing that will never change. prudential. >> it was 1975, my professor at berkley asked me if i wanted to change the world. i said, sure. that's the start of it. exxon mobil has built a new facility to identify the most productive strings of algae. algae are amazing little critters. they secrete oil whic