(CNN) Rep. Alexandria Ocasio-Cortez championed the House impeachment inquiry into President Donald Trump's interactions with Ukraine as a crucial chance to prevent future interference in the 2020 election.

"This Ukraine allegation is head and shoulders, one of the most serious and urgent allegations that we have seen come out of this administration to date," she told CNN's Chris Cuomo on "Cuomo Prime Time," arguing that it had convinced more lawmakers on impeachment than any other issue.

Trump repeatedly pushed for Ukrainian President Volodymyr Zelensky to investigate a potential 2020 political rival , Joe Biden, and his son, Hunter, during a July 25 phone call, according to a transcript of the conversation released by the White House earlier Wednesday.

On the call, Zelensky agreed to the President's request, promising that the next prosecutor general "will look into the situation specifically to the company that you mentioned in this issue."

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