You can access a biography directly from this list. Here is Harry Reid’s. He started in politics at age 30. How is he a millionaire?
Below is an abbreviated outline of Reid’s academic, professional and political career:[2]
1987-present: U.S. Senator from Nevada
1983-1987: U.S. House of Representatives
1977-1981: Chairman, Nevada Gaming Commission
1969-1970: Nevada State Assembly
Insider trading and/or graft would be my guess.