It’s Ukraine. The whistleblower complaint against Donald Trump, according to The Washington Post, regards communication between the president and Volodymyr Zelensky, the president of Ukraine. From The Post:

The complaint involved communications with a foreign leader and a “promise” that Trump made, which was so alarming that a U.S. intelligence official who had worked at the White House went to the inspector general of the intelligence community, two former U.S. officials said.

Two and a half weeks before the complaint was filed, Trump spoke with Ukrainian President … Zelensky, a comedian and political newcomer who was elected in a landslide in May.

Democrats are demanding a full transcript of the conversation between the two leaders. Trump’s personal attorney, Rudolph Giuliani has been under investigation to determine if he tried to influence the Ukrainian government.

The Director of National Intelligence, Joseph Maguire, has refused to share the whistleblower complaint with Congress.

On Thursday, the inspector general, Michael Atkinson, testified before a closed hearing of the House Intelligence Committee. He has strongly disagreed with not sharing the whistleblowers complaint.

So, what was the alleged “promise” that Trump floated to the Ukrainian president? That’s yet to be answered.

It could be about Joe Biden. What we do know is that former Vice President’s son, Hunter Biden, sits on the board of a Ukrainian natural gas company, Burisma. From CNN:

Giuliani, who serves as Trump’s personal attorney, has long lobbied Ukraine to investigate the former vice president’s call in 2016 to remove the country’s top prosecutor, who at one point had been investigating a Ukrainian natural gas company connected to Biden’s son, Hunter.Other Western governments also called for that prosecutor’s dismissal, and no evidence has indicated Biden’s move was inappropriate.

Giuliani appeared Thursday night on CNN: