Rudy Giuliani, President Donald Trump’s personal lawyer who is accused of leading a shadow foreign policy in Ukraine, defied a congressional subpoena Tuesday for documents that House Democrats sought as part of the impeachment inquiry.

Giuliani has acknowledged meeting with Ukrainians and encouraging an investigation of Trump’s political rival, former Vice President Joe Biden. Three committees are focusing their portion of the investigation on Trump’s call July 25 in which he urged Ukraine President Volodymyr Zelensky to investigate Biden while withholding military aid to that country.
The committees demanded documents from Giuliani dealing with "the extent to which President Trump jeopardized national security by pressing Ukraine to interfere with our 2020 election and by withholding security assistance provided by Congress to help Ukraine counter Russian aggression."