globalpublicsquare.blogs.cnn.com — On Fareed Zakaria GPS this week, the U.S., China, Pakistan, Mexico and more. Fareed kicks things off with his take: President Obama's current campaign push is for the "Buffett Rule." But instead, he should focus on Warren Buffett's other mantra: "Invest in America" The Bo Xilai scandal has gone from being an Agatha Christie story to a Chinese version of Watergate.