The Barrie, Ont., politician is one of five candidates vying to lead the party into a provincial election slated for June. The Canadian Press has not independently verified the allegations.
PC MPP Randy Hillier said Patrick Brown "has engaged in dirty and crooked politics", and he maintained that he can back up those allegations.
Brown said the deal never happened and accused a former senior staffer of leaking personal and financial information to the media.
Brown has denied the allegations and has since said he will be suing the news organization. "This includes bank statements, mortgage information, legal documents, all of which is legally protected and personal information".
Some Liberal MPs say they're frustrated the party leadership did not share the political strategy with the caucus on why the government was so adamant on keeping the new controversial reproductive rights clause in the...
Brown, who has jumped into the leadership race surprising everyone, told media that he will be outside Toronto.
Brown's entry into the leadership race threatens to overshadow his opponents - Toronto lawyer Caroline Mulroney, former Toronto councillor Doug Ford, former Tory legislator Christine Elliott and social conservative activist Tanya Granic Allen.
Brown also defended himself against accusations that party membership numbers had been exaggerated.
He says that when he was first elected leader in 2014, there were 12,000 members "and whether it's 145,000 or 180,000 or 200,000, it's still the largest we have ever been".
"There is one person at party headquarters who looks after every single membership form and verifies the payment", he said on Facebook. While the last few weeks have been challenging, our Party has never been stronger.
"I don't know what the end result will be in terms of all of this mess but it's certainly garnering a lot of attention", said NDP Leader Andrea Horwath.