The case for and against impeaching President Donald Trump
By Marshall Cohen
What The Polls Say About Impeachment Before The First Public Hearing
By Nathaniel Rakich & Laura Bronner
Trump, Ukraine and Impeachment: The Inside Story of How We Got Here (Published 2019)
By Andrew E. Kramer, Sharon LaFraniere & Danny Hakim
Key players in the Trump impeachment probe and what they testified to Congress
By Benjamin Siu & Anne Flaherty