Rudy Giuliani is grinning like the Cheshire cat. His standard smile.

For the past several weeks, the personal attorney to President Trump has been in Ukraine, interviewing witnesses and gathering evidence to shed light on what the Bidens were up to during the Obama years, and get to the bottom of claims that Kiev interfered in the 2016 US election in favor of Hillary Clinton. He has enlisted the help of former Ukrainian diplomat, Andriy Telizhenko, to gather information from politicians and ask them to participate in a documentary series in partnership with One America News Network (OANN) - which will make the case for investigating the Bidens as well as Burisma Holdings - the natural gas firm which employed the son of a sitting US Vice President in a case which reeks of textbook corruption.

According to the Journal, Giuliani will present findings from his self-described "secret assignment" in a 20-page report.

Trump and Giuliani say then-Vice President Biden engaged in corruption when he called for the ouster of a Ukrainian prosecutor who had investigated a Ukrainian gas company where Hunter Biden served on the board. The Bidens deny wrongdoing, and ousting the prosecutor was a goal at the time of the U.S. and several European countries. -Wall Street Journal

(Note the Wall Street Journal's use of a straw man when they write: "The allegations of Ukrainian election interference are at odds with findings by the U.S. intelligence community that Russia was behind the election interference."

Apparently the three journalists who collaborated on the article didn't get the memo that two countries can meddle at the same time, nor did any of them read the January, 2017 Politico article: Ukrainian efforts to sabotage Trump backfire - which outlines how Ukrainian government officials conspired with a DNC operative to hurt the Trump campaign during the 2016 election - a move which led to the disruptive ouster of campaign chairman Paul Manafort).

Rudy Giuliani’s trip to Kyiv this month, which he described as a “secret assignment,” included a meeting with Ukrainian lawmaker Andriy Derkach. PHOTO: PRESS OFFICE OF ANDRIY DERKACH/ASSOCIATED PRESS

Telizhenko, the former diplomat, tells the Journal that the plan for the series was conceived during the impeachment hearings as a way for Giuliani to tell his side of the story. The former Ukrainian diplomat flew to Washington on November 20 to film with Giuliani, while in early December he accompanied America's Mayor on the Kiev trip - stopping in Budapest, Vienna and Rome.

Rudy comes home

Upon his return to New York on Saturday, Giuliani says he took a call from President Trump while his plane was still taxiing down the runway, according to the Wall Street Journal.

"What did you get?" Trump asked. "More than you can imagine," answered the former New York mayor who gained notoriety in the 1980s for taking down the mob as a then-federal prosecutor.

According to the 77-year-old Giuliani, Trump instructed him to brief Attorney General William Barr and GOP lawmakers on his findings. Soon after, the president then told reporters at the White House, "I hear he has found plenty."

Rudy has been working on this project for a while. In late January, he conducted phone interviews with former Ukrainian prosecutors Viktor Shokin and Yiury Lutsenko. On the call was George Boyle - Giuliani's Chief Operating Officer and Director of Investigations. Boyle started as a NYPD beat cop in 1987, and was promoted to detective - eventually joining the Special Victims Squad. In short, the ever-grinning Giuliani has some serious professionals working on this.

"When he believes he’s right, he loves taking on fights," said longtime Giuliani friend, Tony Carbonetti.

That said, Giuliani's efforts have not gone off without a hitch. In October, two associates - Lev Parnas and Igor Fruman, both of whom assisted with his Ukraine investigation, were related in October on campaign-finance charges. Both men have pleaded not guilty, while Giuliani denies wrongdoing and says they did not lobby him. Parnas, notably, was also on the January call with Shokin and Lutsenko as a translator.

In pressing ahead on Ukraine, Mr. Giuliani has replaced the translation skills of Messrs. Parnas and Fruman with an app he downloaded that allows him to read Russian documents by holding his phone over them. But on his recent trip, he said, “despite whatever else you can say, I missed them.” -Wall Street Journal

Trump opponents insist Giuliani is conducting shadow foreign policy and orchestrated the ouster of former US Ambassador to Ukraine, Marie Yovanovitch - who Ukraine's new president Volodomyr Zelensky complained on a now-famous July 25 phone call accused of not recognizing his authority.

In the impeachment hearings, witnesses accused Mr. Giuliani of conducting a shadow foreign policy and orchestrating the ouster of the U.S. ambassador to Ukraine. He was described as “problematic” and “disruptive” and, in testimony that cited former national security adviser John Bolton, likened to a “hand grenade that’s going to blow everybody up.” Mr. Giuliani has said he kept the State Department apprised of his efforts and that he was working at the president’s behest. -Wall Street Journal

"Just having fun while Dems and friends try to destroy my brilliant career," Giuliani wrote in a text message while conducting his investigation overseas.