Tory donor John McGlynn's concern over new leader
8 November 2011 Last updated at 11:40 GMT
Scottish Conservative donor John McGlynn said new Tory leader Ruth Davidson "had a week to 10 days" to prove herself.
He told BBC Newsnight Scotland: "Ruth has to prove she is capable of coming up with ideas and policies that will resonate with the people of Scotland in the way that Murdo Fraser did.
"She has to prove that the Tory Party has learned the lessons of electoral defeat."
Mr McGlynn said he had made no decision on future donations, but he added that he "wanted to support" the party.
He acknowledged that it was "very, very" early days for Ms Davidson and she had a "difficult job ahead".
Mr McGlynn spoke to BBC Newsnight Scotland's Glenn Campbell.