The raw data behind the story "Looking For Clues: Who Is Going To Run For President In 2016?" https://fivethirtyeight.com/features/2016-president-who-is-going-to-run/.
A data frame with 25 rows representing potential presidential primary candidates and 5 variables:
Potential presidential candidate
Date of event
Likelihood of running score, 1 = Not running, 5 = Definitely running