READ: EU ambassador testifies as part of House impeachment inquiry

Gordon SondlandGordon SondlandGOP chairman vows to protect whistleblowers following Vindman retirement over 'bullying' Top Democrat slams Trump's new EU envoy: Not 'a political donor's part-time job' Trump names new EU envoy, filling post left vacant by impeachment witness Sondland MORE, the U.S. ambassador to the European Union, told Congress on Thursday that he had no knowledge of the Trump administration allegedly withholding foreign aid in exchange for information on former Vice President Joe BidenJoe BidenDavis: Supreme Court decision is bad news for Trump, good news for Vance Teachers face off against Trump on school reopenings Biden wins Puerto Rico primary MORE or his son Hunter.

“Let me state clearly: Inviting a foreign government to undertake investigations for the purpose of influencing an upcoming U.S. election would be wrong," Sondland said in the closed-door hearing, according to his opening statement. "Withholding foreign aid in order to pressure a foreign government to take such steps would be wrong."

ADVERTISEMENT

Sondland, a key witness in the House's ongoing impeachment inquiry into President TrumpDonald John TrumpDavis: Supreme Court decision is bad news for Trump, good news for Vance Meadows trying to root out suspected White House leakers by feeding them info: Axios Pressley hits DeVos over reopening schools: 'I wouldn't trust you to care for a house plant let alone my child' MORE, said he "did not and would not ever participate in such undertakings."

"In my opinion, security aid to Ukraine was in our vital national interest and should not have been delayed for any reason," he said. In his statement, Sondland also describes his participation in key meetings with Ukrainian President Volodymyr Zelensky and Trump attorney Rudy GiulianiRudy GiulianiDavis: Supreme Court decision is bad news for Trump, good news for Vance Sunday shows preview: Coronavirus poses questions about school safety; Trump commutes Roger Stone sentence Nadler: Barr dealings with Berman came 'awfully close to bribery' MORE as well as conversations with Trump.

Read Sondland's opening statement to the congressional committees below.