The case for and against impeaching President Donald Trump
By Marshall Cohen
Trump, Ukraine and Impeachment: The Inside Story of How We Got Here (Published 2019)
By Andrew E. Kramer, Sharon LaFraniere & Danny Hakim
The key impeachment question: What did Trump want from Ukraine — and what exactly did he do?
By Greg Jaffe
Key players in the Trump impeachment probe and what they testified to Congress
By Benjamin Siu & Anne Flaherty