According to a formal whistleblower complaint, President Donald Trump withheld Congressionally-appropriated aid from Ukraine in an attempt to pressure Ukraine’s new president, Volodymyr Zelensky, to investigate Trump’s 2020 political rival, former Vice President Joe Biden. In addition to seeking dirt on Biden, Trump also asked Zelensky to help locate the computer server allegedly used by the Democratic National Committee that was hacked by Russia, suggesting that Trump is intent on relitigating the Mueller investigation into the 2016 campaign.