(CNN) – Rudy Giuliani on Wednesday questioned Joe Biden's "mental capacity" to lead, delivering a blistering attack against the vice president's competence one day after Biden made a controversial remark on the campaign trail.
"I mean, this guy just isn't bright. He's never been bright. He isn't bright," Giuliani, a Republican, said on CNBC. "And people think, `Well, he just talks a little too much.' Actually, he's just not very smart."
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Giuliani also slammed Biden in an interview on CNN's "Piers Morgan Tonight."
On Tuesday, the vice president stirred controversy when he told a Virginia crowd that Mitt Romney's vision for Wall Street reform would reduce regulations and put people "in chains."
"(Romney) is going to let the big banks once again write their own rules, unchain Wall Street," Biden said at a campaign event in Danville. "He is going to put y'all back in chains."
Romney's campaign quickly seized on the comment–they called it a "new low" in the campaign–while some conservatives on Twitter accused Biden of using racial undertones.
The vice president later Tuesday clarified the remarks at a campaign event, suggesting his comments were in reference to House Speaker John Boehner's use of the word 'unshackled' in talking about Rep. Paul Ryan's House budget proposal.
"I'm using their own words. I got a message for them," Biden said. "If you want to know what's outrageous, it's their policies and the effects of their policies on middle class America. That's what's outrageous."
Obama's deputy campaign manager Stephanie Cutter also attempted to dispel the controversy around Biden's statement Tuesday, reiterating the fact that Republicans have called for the "unshackling" of the private sector from regulations in recent months.
"Since then, the Vice President has often used a similar metaphor to describe the need to 'unshackle' the middle class," Cutter said in a statement. "Today's comments were a derivative of those remarks, describing the devastating impact letting Wall Street write its own rules again would have on middle class families."
But a number of conservatives said his language went too far. Twitter quickly lit up with criticism of his comment, and coverage of the incident dominated the political news cycle for much of the day.
Giuliani, who ran for president in 2008 and flirted with another White House bid this cycle, argued the vice president's remark was more than a gaffe or slip of the tongue–but an alarming indicator of Biden's intelligence. Calling him a "laugh line on late night television," the former mayor said he's never "seen a vice president that has made as many mistakes" or "said as many stupid things."
"I mean, there's a real fear if, God forbid, he ever had to be entrusted with the presidency, whether he really has the mental capacity to handle it," Giuliani said.
– CNN's Ashley Killough contributed to this report.
Watch Piers Morgan Live weeknights 9 p.m. ET. For the latest from Piers Morgan click here.
In other breaking news, the earth is round......
Giulaini only knows 3 things a noun,a verb, and 9/11, and HE saysBiden isn't bright?
ANYBODY who follows politics knows that Biden's got quite a brain, has deep understanding of international issues, but has a politician's jesting style that gets him in trouble - AND that Rudy's got a very small view of the world and has held a grudge since 2007, when Biden coined his favorite criticism of Rudy - every sentence out of his mouth has a noun, a verb and 9/11. Rudy's become such a joke that when the media shows up to interview him, he thinks it's because of his statesmanship, but it's really because he's such a joke.
That is rich coming from a self-aggrandizing, little adulterer with a Napoleon complex.
Joe Biden is one of the most professional, super-knowledgable, likeable and truly human politicians ever.
With a temper and a superior sense of humor. Thank God there are but a few of them left.
(For a terrible comparison look at Romney and Ryan!!!!!)
Who asked you for your two cents crossdresser? The VP is more capable of being POTUS than the two morons currently on the republican ticket.
WOW! take it from a foreigner: EXTREMELY PRESUMPTUOUS, COMING FROM PROBABLY THE GREATEST NIT WIT ON THE US POLITICAL SCENE – RIGHT UP THERE WITH FAILIN' PALIN.
Let me assure you that Biden is a thousand times brighter than you! In my opinion, you have consistently shown that you are seriously deranged! VERY SAD FELLOW!
Nothing says "I'm a GOPer/teatroll" like getting inconsolably outraged when someone uses a metaphor that you agree with when it's some batsh-t crazy right wing extremist spewing it.
I do believe he just called the V-POTUS dumb. Amazing from remark who ran a campaign that was not noted for not being "too bright" when it came to strategy. Rudy had that "Florida Strategy" thing going on. He was lost and out of it long before the FL primary was held.
And Romney says the democrats are spreading hate.
yikes! rudy saying out loud what the entire country knows but has kept buried deep inside. Liek I have said many times, i want to see biden's psychological and medical evaluations. he's not only dumb but going senile.
Whatever Rudy Giuliani says, I simply ignore. Why? Because, I mean, this guy just isn't bright. He's never been bright. He isn't bright. By the way, he is also a cruel wife deserter, adulterer, and ... well, just not bright, you know. He isn't bright.
Wasn't it Biden the one who said of Giulliani ""There's only three things he mentions in a sentence: a noun, and a verb and 9/11,"?
Managing to sink Guilliani's campaign for president singlehandedly with a one-liner is the work of genius.
Gulianni wishes he had half the knowledge Biden does. Rudy's only claim to fame is he just happen to be mayor of NY city during 9/11. He has done nothing else to contribute to society in any other way. He is a loser whose political career is done. Biden was smart enough to figure out how to be around and involved a lot longer than this clown!
Boom. Now if you are going to take a shot at someone, that is how you do it. Biden has been a horrible VP, sometimes I wonder if he is actually trying to make Obama look bad.
This from a guy that was about to be run out of town on a rail for "stupid" stuff until 9-11 happened? Pot, meet kettle.
VP Biden is a lot smarter than Juli!!!
But even the New York Times agrees with Giuliani as do numerous writers and political analysts. What Giuliani said is nothing new about Biden.
Hey, Gaffy Joe...Next time you want to put your foot in your month – wear a newer pair of shoes.
Saying Republicans will put black americans back in chains is like saying former Gov. Of Alabama George Wallace welcomed Blacks to use his toilet in his house. Ain't happening.
By the way our Democrybaby friends, you owe Lt.Cor. and House Representative Allen West an appology.
Little Joe was busted with his hand in the cookie jar ... The question is ... will Obama feel he is such a great libility that he dumps him at the convention? I would not be suprised
Well, Rudy, I would think it would be better to be regarded as "not bright" than dishonest, which is why you lost in 2008.
Didn't Guiliani's Police Chief wind up being convicted because of his associations with the mob? Yup.
This is a play on word. Now when House Speaker John Boehner's use of the word 'unshackled' in talking about Rep. Paul Ryan's House budget proposal was this also using racial undertones and Biden's statement Tuesday, reiterating the fact that Republicans have called for the "unshackling" of the private sector from regulations in recent months. Rudy Giuliani don't have mental capacity to lead that he lose his JOB.
Aww.... little Rudy is still upset that big bad Joe hurt his feelings...
"probably the most underqualified man since George Bush to seek the presidency... there's only three things he [needs] to make ... a sentence: a noun and a verb and 9/11." – Joe Biden, Oct 2007
"I mean, this guy just isn't bright. He's never been bright. He isn't bright," Giuliani, a Republican, said
LOL - this coming from a guy who wanted to be president and no one would elected him about a guy that is a heart beat away!!!! Guess Joe is smarted that everyone things!
obama and biden, an incompetent and a gaffomatic buffoon. and we wonder why the country is a disaster.
Obama/Biden – Forward to Four more years of Incompetence and Buffoonery