READ: Ex-Ukraine ambassador's opening statement in impeachment hearing

Former U.S. Ambassador to Ukraine Marie YovanovitchMarie YovanovitchJim Jordan requests documents from Pompeo regarding Hunter Biden, Burisma  Trump taps new ambassador to Ukraine America's diplomats deserve our respect MORE testified on Friday that she believes Rudy GiulianiRudy GiulianiRudy Giuliani calls on Cuomo to remove Bill de Blasio Sunday shows preview: States begin to reopen even as some areas in US see case counts increase Moussaoui says he now renounces terrorism, bin Laden MORE and associates of the president's personal attorney pushed for her ouster earlier this year, calling it a "smear campaign."

She argued during the second public hearing of the House impeachment inquiry that the system was successfully manipulated to push for her removal.

"Unfortunately, as the past couple of months have underlined, not all Ukrainians embraced our anti-corruption work," she said, referring to her time as ambassador.

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"What continues to amaze me is that they found Americans willing to partner with them and, working together, they apparently succeeded in orchestrating the removal of a U.S. ambassador. How could our system fail like this? How is it that foreign corrupt interests could manipulate our government?" she said.

Read Yovanovitch's full opening statement below.