It should be noted that the process has kicked off in September 2019, over allegations that Trump improperly sought foreign influence in the 2020 election by demanding a corruption investigation in Ukraine.

Last week, the Senate rejected a proposal by Democrats to call additional witnesses, in a 49-51 vote that saw Susan Collins (R-Maine) and Mitt Romney (R-Utah) cross the aisle. The president’s lawyers argued that all the relevant testimonies and documents should have been produced during the proceedings in the House, which ended on December 18, 2019 with a partisan vote to impeach Trump.

No House Republicans supported the articles of impeachment. They were joined by two Democrats who voted against the first article and three who voted against the second, while another – presidential candidate Tulsi Gabbard (D-Hawaii) – voted “present” on both.

Even though the Democrats argued that impeachment was necessary because Trump was a “clear and present danger” to “our democracy,” House Speaker Nancy then waited four weeks to send the case to the Senate.

The claim originated with an unnamed intelligence community “whistleblower,” who alerted House Intelligence Committee chair Adam Schiff (D-California) of the phone call between Trump and Ukrainian President Volodymyr Zelensky in July 2019. Schiff and his team of impeachment managers argued that Trump withholding the aid was an attempt at pressuring Kiev into investigating corruption at Burisma, a gas company that had hired the son of Vice President Joe Biden in 2014.

In the meantime, Joe Biden is now one of the candidates for the 2020 presidential nomination, and Democrats argued this amounted to foreign interference in the election. Calling this an abuse of power, Democrats also charged Trump with “obstruction of Congress” for invoking executive privilege and refusing to allow some of the White House officials to testify in impeachment proceedings.

Trump’s lawyers argued that Schiff’s subpoenas had no validity until the House voted to actually authorize the impeachment process, on October 31. They also said that the president’s actions were perfectly consistent with his constitutional authority, that investigating Burisma did not amount to Ukrainian interference in US elections, and that Trump was denied due process rights because Democrats did not give the Republican minority a hearing day or the right to call their own witnesses.