REUTERS

U.S. Secretary of State Mike Pompeo said it was "wholly appropriate" for President Donald Trump to ask Ukraine's leader to investigate corruption in his country.

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"I found that to be wholly appropriate to try to get another country to stop being corrupt," Pompeo said in an interview on PBS's "NewsHour" program, according to Reuters.

Pompeo has said he listened to the July 25 call between Trump and Ukrainian President Volodymyr Zelensky, in which Trump asked Zelensky to investigate Democratic presidential candidate Joe Biden and his son Hunter, who was on the board of a Ukrainian gas company.

The call has sparked a U.S. House of Representatives' impeachment probe of Trump.