President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE's attorney Rudy Giuliani Rudy GiulianiThe Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting CIA found Putin 'probably directing' campaign against Biden: report Democrats fear Russia interference could spoil bid to retake Senate MORE changed course late Friday, declaring he would no longer go on a planned trip to Ukraine to press for an investigation into Democratic presidential candidate Joe Biden Joe BidenBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Democratic groups using Bloomberg money to launch M in Spanish language ads in Florida Harris faces pivotal moment with Supreme Court battle MORE.

Giuliani announced the decision Friday night during an appearance on Fox News. "I'm not gonna go," he said before blaming Democrats for trying to "spin" the trip.

"I think I'm walking into a group of people that are enemies of the president, in some cases enemies of the United States, and in one case an already convicted person who has been found to be involved in assisting the Democrats with the 2016 election," Giuliani said without clarifying to whom he was referring.

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The news came hours after Trump told Politico in an interview that he planned to speak with Giuliani about his trip and the investigation.

"I will speak to him about it before he leaves. I’m just curious about that," he told the outlet, saying that he has "not spoken to him at any great length" about the trip.

Giuliani first revealed his plans to travel to Ukraine in an interview with The New York Times on Thursday. The president's lawyer said he hoped to meet in the nation's capital, Kiev, to ask the country's president-elect to pursue inquiries that could yield new information about the origin of the Russia investigation and former Vice President Biden's past influence in the country.

The Times reported that the meeting's goal was to try to undermine the credibility of special counsel Robert Mueller's probe and the case against former Trump campaign chairman Paul Manafort. Trump's allies are also reportedly seeking information that could hurt Biden, who has been a clear front-runner in recent polls for the 2020 Democratic presidential nomination.

Giuliani last week called for an investigation into Biden after the Times reported that Biden allegedly threatened to withhold $1 billion in U.S. loan guarantees in 2016 unless Ukraine removed a top prosecutor, who was later voted out. Biden’s son Hunter was a board member of an energy company that the prosecutor had been looking into, according to the newspaper.

Democrats on Capitol Hill lambasted Giuliani over the proposed trip, accusing him of seeking aid from a foreign government.

House Judiciary Committee Chairman Jerrold Nadler Jerrold (Jerry) Lewis NadlerDemocrats shoot down talk of expanding Supreme Court Schumer: 'Nothing is off the table' if GOP moves forward with Ginsburg replacement Top Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence MORE (D-N.Y.) slammed the move, saying, "We've come to a very sorry state when it's considered OK for an American politician, never mind an attorney for the president, to go and seek foreign intervention in American politics."

In a tweet, House Intelligence Committee Chairman Adam Schiff Adam Bennett SchiffPelosi, Democrats unveil bills to rein in alleged White House abuses of power Chris Matthews ripped for complimenting Trump's 'true presidential behavior' on Ginsburg Trump casts doubt on Ginsburg statement, wonders if it was written by Schiff, Pelosi or Schumer MORE (D-Calif.) called the plan "immoral, unethical, unpatriotic and, now, standard procedure."

Giuliani added to Fox News on Friday that he won't go to Ukraine "in order to remove any political suggestion."

"I will step back and I'll just watch it unfold," he said.

The news comes after Mueller earlier this year concluded his probe into whether the Trump campaign coordinated with Russia to influence the 2016 presidential election. Mueller did not establish that members of the Trump campaign conspired with Russia, though he detailed extensive contacts between Trump associates and Russian figures.

Democrats are pushing for an unredacted version of the Mueller report, over which Trump has exerted executive privilege. The House Judiciary Committee voted this week to hold Attorney General William Barr in contempt of Congress for refusing to turn over Mueller's unredacted report and the underlying evidence.