Sources said the set led them to learn about Giuliani's dealings with Derkach and other Russian activists who wanted to provide him with information that the Democrats were trying to discredit Joe Biden.
"To anyone who feels overwhelmed or apathetic about this election, there is nothing I relate to more than desperation to escape corrosive political discourse", she wrote. "I may not be able to change my father's mind, but together, we can vote this toxic administration out of office". But the chasm was painful nonetheless, and multiplied exponentially in Trump's tribal partisanship.
But the official said Trump had "shrugged his shoulders" at O'Brien's warning, dismissing concerns about Giuliani by saying, "That's Rudy", according to the Post, which noted that the lawyer visited the White House in mid-December, just after the House Judiciary Committee approved the articles of impeachment, and then met with Trump days later in Florida.
Republican Rudy, who served as mayor of New York City from 1994 until 2001, now works as President Trump's personal lawyer and is well-regarded as one of his closest allies.
Giuliani recalled getting into debates about politics with her father, a former assistant USA attorney, when she was 12, or "probably before I was emotionally equipped to handle such carnage".
"The only way to end this nightmare is to vote. A large portion of the President's legal defense case revolved around strong evidence that former Vice President Biden's son, Hunter, was peddling his influence to his father to land lucrative jobs overseas that he might not have otherwise been qualified for", the letter continued.
The CIA and other intelligence agencies have gathered intelligence Rudy Giuliani interacted with Russian intelligence agents past year and sent that information to the White House, a source familiar with the matter told NBC News.
"It felt important to speak my mind, and I'm glad we at least managed to communicate at all". She referred to Biden's choice of Senator Kamala Harris as his operating mate and the incorporation of Senator Bernie Sanders and Senator Elizabeth Warren's platforms into his marketing campaign.
In the weeks leading up to the release of her essay, Giuliani stepped up her social media presence, at times targeting her father's own work on behalf of Trump.
'We are hanging by a single, slipping finger on a cliff's edge, and the fall will be fatal.
"We have to stand and fight", she argues.
"It is taken persistence and nerve to search out my voice in politics, and I am utilizing it now to ask you to face with me within the battle to finish Donald Trump's reign of terror", she added.
She additionally publicly supported Hillary Clinton within the 2016 election.