On 28 March 2005, Montgomerie launched the ConservativeHome website in the period just before the general election campaign that year.
With Conservative MP John Hayes, he also set up conservativedemocracy.com, which successfully co-ordinated grassroots opposition to party leader Michael Howard's attempt to abolish the "one member, one vote" rule in the 2005 Conservative leadership election.

In September 2006, The Independent described Montgomerie as "emerging as a major player in Tory politics."
He was critical of the A-List and argued that the party leader after 2005, David Cameron, was in danger of alienating working-class Tory voters, and pressed Cameron for specific pledges on tax cuts.
He supported the introduction of same-sex marriage in England and Wales arguing that it was a way to strengthen the institution more generally.
Through ConservativeHome, Montgomerie was used as an expert on internet campaigning by Conservative Central Office.
On 28 March 2005, Montgomerie launched the ConservativeHome website in the period just before the general election campaign that year. With Conservative MP John Hayes, he also set up conservativedemocracy.com, which successfully co-ordinated grassroots opposition to party leader Michael Howard's attempt to abolish the "one member, one vote" rule in the 2005 Conservative leadership election.
In September 2006, The Independent described Montgomerie as "emerging as a major player in Tory politics." He was critical of the A-List and argued that the party leader after 2005, David Cameron, was in danger of alienating working-class Tory voters, and pressed Cameron for specific pledges on tax cuts. He supported the introduction of same-sex marriage in England and Wales arguing that it was a way to strengthen the institution more generally. Through ConservativeHome, Montgomerie was used as an expert on internet campaigning by Conservative Central Office.
Tim Montgomerie