Memorize these and you could recognize 5.4% of all 20th Century America clues.
| # | Answer | Appearances | Sample Clue |
|---|---|---|---|
| 1 | Richard Nixon | 3 | In August 1974 he returned to his home in San Clemente, California, reportedly in a deep depression |
| 2 | the Columbia | 2 | In 1942 Grand Coulee Dam began generating power on this river |
| 3 | California | 2 | The passage of this state's Proposition 13 in 1978 sparked similar tax revolts in other states |
| 4 | Sinclair Lewis | 2 | This novelist refused the Pulitzer Prize for "Arrowsmith" but accepted the Nobel Prize 4 years later |
| 5 | Huey Long | 2 | On September 8, 1935 this Louisiana senator was shot by Dr. Carl Weiss in Baton Rouge |