Don Brash, the man who forced Rodney Hide out of his job as Act leader, approached him recently to urge him to return to the party leadership and to run for Act in Epsom.
Dr Brash told the Herald that Mr Hide was not interested at the time but the approach was made before current leader John Banks announced he would step down in February and would not stand at the 2014 election.
Mr Hide has been uncharacteristically silent on the issue, refusing to rule himself out or say whether he is considering it.
Dr Brash said there was some irony in him trying to get Mr Hide back into Act but said: "I didn't push him out in 2011 because I thought he was incompetent. But I thought his reputation at that point was such that he was unlikely to be able to hold Epsom and, if he didn't hold Epsom, Act was gone."
Dr Brash said that while there were some negatives around Mr Hide, there were some important positives.