From May to August 2019, President of the United States Donald Trump and his personal attorney Rudy Giuliani repeatedly pressed the Government of Ukraine to investigate Democratic presidential candidate Joe Biden and his son Hunter.[1][2][3] A report released on September 25, 2019, stated that Trump would talk with Ukrainian president Volodymyr Zelensky only if they discussed Biden.[4] At the same time, Trump placed a hold on military aid to Ukraine.