Timeline of events for the last investagations of US Presidents

Watergate Chronology

http://watergate.info/chronology 

Iran-Contra Timeline

https://genius.com/President-ronald-reagan-iran-contra-timeline-annotated

Whitewater Chronology

http://www.washingtonpost.com/wp-srv/politics/special/whitewater/timeline.htm 


Timeline: The Criminal Investigation, including President Bush

http://www.washingtonpost.com/wp-dyn/content/custom/2007/03/06/CU2007030600916.html 

Benghazi Timeline

https://www.factcheck.org/2012/10/benghazi-timeline/

Trump-Russia timeline

https://www.politico.com/trump-russia-ties-scandal-guide/timeline-of-events