Rudy Giuliani pushes back on testimony that he was drunk on election night 2020, says he was drinking Diet Coke

• Rudy Giuliani's office tweeted that the former mayor drank Diet Coke on election night 2020.

Rudy Giuliani responded to claims that he was drunk on election night 2020 in a tweet on Monday night, insisting he "was drinking diet coke all night."

The claim about the former New York mayor's behavior at the White House election night party resurfaced during Monday's January 6 committee hearings.

$4 former advisor to then-President Donald Trump Jason Miller said: "I think the mayor was definitely intoxicated, but I do not know his level of intoxication when he spoke with the president, for example."

After, the former mayor's media office tweeted about his drinking Diet Coke, attributing the claim to an unnamed "fellow guest."

—The Official Giuliani Media (@RudyCommon) $4

$4, the media office wrote: "The January 6th committee is not trying to seek the truth," instead suggesting topics Giuliani thought the committee should focus on.

Miller's comment to the committee is consistent with a detailed account from "I Alone Can Fix It: Donald J Trump's Catstrophic Final Year," by Carol D. Leonnig and Philip Rucker, $4

Per their account of election night, Giuliani was "causing a commotion," and several people around him $4, prompting Miller and two other advisors to take him aside.

There, the account says, Giuliani urged advisors to tell Trump he had won the election, despite the available voting totals not supporting that conclusion.

Michael Wolff, author of "Landslide: the Final Days of the Trump President," $4 last year that Giuliani was "incredibly drunk" on election night.

(Wolff's work has come under scrutiny after $4 pointed out inconsistencies in an earlier book on Trump, "Fire and Fury." Wolff has said he is "comfortable" with everything in it.)

The question of what Giuliani drank may be relevant to the January 6 committee hearings as it sheds light on the quality of the information Trump sought out from advisors on election night.

$4, committee member Rep. Liz Cheney referred to upcoming testimony that would show Trump "rejected the advice of his campaign experts on election night, and instead followed the course recommended by an apparently inebriated Rudy Giuliani, to just claim he won, and insist that the vote counting stop."

Speaking to CNN after the hearing, however, committee member Rep. Jamie Raskin said that he "really can't tell the difference" between Giuliani sober and Giuliani drunk, $4.

"And it doesn't make any difference, because what he was spouting – as Attorney General Barr said and as numerous witnesses confirmed – was complete nonsense."

He was referring to $4, where he said Trump's election-fraud claims were "complete bullshit."

Giuliani's office did not immediately respond to Insider's request for additional comment.