Ahead of Caroline Kennedy's confirmation hearing Thursday to become ambassador to Japan, here's a break down of 3 types of people who become ambassadors.

The 3 types of U.S. ambassadors

Caroline Kennedy's appointment to serve as ambassador of Japan has drawn attention for her lack of related experience.But not all ambassadors are career diplomats. Some are politicians who are needed for their sensitive touch, while others are campaign donors or allies who are looking for a cushy gig. Here's a look at the three main type of people whom the president asks to serve as our nation's top diplomat within a country. Power PolsThen-U.S. Ambassador to China Jon Huntsman Jr. ...

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