Former Secretary of State Hillary ClintonHillary Diane Rodham ClintonImpeachment hearings don't move needle with Senate GOP GOP divided over impeachment trial strategy 'Too Far Left' hashtag trends on Twitter MORE blasted President TrumpDonald John TrumpTrump reversed course on flavored e-cigarette ban over fear of job losses: report Trump to award National Medal of Arts to actor Jon Voight Sondland notified Trump officials of investigation push ahead of Ukraine call: report MORE on Friday after his personal attorney Rudy GiulianiRudy GiulianiSondland notified Trump officials of investigation push ahead of Ukraine call: report Impeachment hearings don't move needle with Senate GOP Want to fight foreign influence? Fix FARA filings MORE said he asked Ukraine to look into former Vice President Joe BidenJoe BidenSondland notified Trump officials of investigation push ahead of Ukraine call: report Biden says he won't legalize marijuana because it may be a 'gateway drug' Impeachment hearings don't move needle with Senate GOP MORE.

“The president asked a foreign power to help him win an election. Again,” Clinton, the 2016 Democratic presidential nominee, tweeted.

Clinton was responding to Giuliani's interview on CNN the previous night in which he said "of course" he asked Ukraine to look into Biden, the current Democratic presidential front-runner for 2020.

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The former secretary of State and 2016 Democratic nominee also appeared to be referencing one of Trump’s 2016 campaign stops in which he encouraged Russia to look for Clinton’s emails from a private server.

“Russia, if you're listening, I hope you're able to find the 30,000 emails that are missing. I think you will probably be rewarded mightily by our press,” Trump said in 2016. 

Giuliani gave CNN’s Chris CuomoChristopher (Chris) Charles CuomoScaramucci: Trump sees Bloomberg as threat Schiff: Trump helped House Republicans plan to storm SCIF NY Gov. Andrew Cuomo uses N-word during radio interview MORE conflicting answers on Thursday night as to whether he asked Ukraine to investigate Biden’s reported connection to the country, initially denying that he asked Ukraine to investigate the former vice president before seconds later saying he did.

In 2016, while he was vice president, Biden threatened to withhold $1 billion in U.S. loan guarantees unless Ukraine removed a top prosecutor, The New York Times reported.

The Ukrainian prosecutor, who was later voted out on corruption allegations, was looking into an energy company whose board included Biden’s son Hunter. While Joe Biden did push for the prosecutor's dismissal, the move reflected the position of several other Western countries.

Giuliani said last month that he had spoken to a Ukrainian official about Biden’s reported role in the prosecutor’s dismissal.

"The only thing I asked about Joe Biden is to get to the bottom of how it was that Lutsenko ... dismissed the case against AntAC," Giuliani said, referring to former Ukrainian prosecutor General Yuriy Lutsenko and the Ukrainian-based Anti-Corruption Action Centre.