Asked about the Grant Shapps-Wikipedia claims, Conservative Education Secretary Nicky Morgan told Good Morning Britain:
Knowing Grant as I do, I find it completely unbelievable that he would do such a thing.
I have to say I think this is all about the Labour Party trying to detract from the point we have been making about the deal that they would have to do with the SNP, which is going to cost people in this country a lot of money and is not something I think that we want to see - it would result in more debt, more borrowing, higher taxes.
This is all about detracting from that story and I'm afraid I think it's a smear tactic that won't work. This is not something that Grant would do.
David Cameron has defended Grant Shapps after the Conservative chairman was accused of anonymously editing his own entry on Wikipedia.
Taking questions after a speech in Bedford, Mr Cameron was asked whether he had "full confidence" in his chairman, and replied: "Grant does a great job. He has made a very clear statement about this and I have got nothing to add to that."
Liberal Democrat leader Nick Clegg mocked Grant Shapps, who used the pseudonym Michael Green for his internet business.
At a press conference in central London, Mr Clegg said Mr Shapps has "fervently denied" involvement in editing his Wikipedia page.
He continued: "I'm prepared to believe it. It just could have been someone else - Michael Green, for instance. Boom, boom."
The Conservative Party chairman has become involved in a row over claims that he was behind changes to the Wikipedia pages of Tory rivals.Read the full story ›
A mystery candidate has registered to stand against Grant Shapps in the election using his business pen name.Read the full story ›
The Conservative Party chairman Grant Shapps was ambushed by Ukip supporters as he visited Sandwich with Michael Howard as party of the election campaign.
Conservative Party chairman Grant Shapps said he did work as a web marketer under a pseudonym after entering Parliament.Read the full story ›
Conservative party chairman Grant Shapps has said politicians should not be using Twitter to judge the public but that the public should be judging politicians, after Emily Thornberry's tweet led to her resigning from the front bench.
Speaking as one of the guests on The Agenda with Tom Bradby Mr Shapps said it was still important for MPs to be on Twitter: "Politicians can either hide away or they can be out there. It's not just tweeting - it's about replying to people who tweet to you."
Other guests on the programme on ITV at 10.35pm tonight are feminist writer Germaine Greer, poet Benjamin Zephaniah and Telegraph Women's Editor, Emma Barnett.
Ukip's win in Clacton and massive boost in support in the Heywood and Middleton byelection is "a wake up call" to the Tories, Conservative Party chairman Grant Shapps said.
He told Good Morning Britain that Ukip had taken votes from all parties, but had "cost Conservatives seats in Parliament," putting Ed Miliband closer to Number 10.
Conservative Party chairman Grant Shapps has said the Clacton byelection result "shows if you vote Labour you get Ukip.
Grant Shapps: "In his conference speech [the PM said] that you vote for Farage, you got to bed with Farage and wake up with Ed Miliband."
Shapps told Good Morning Britain the UK "will face a massive choice" at the General Election next year.
"It's the most significant General Election for generations," he added.