The robocall controversy appears to be broadening, with opposition parties claiming the number of ridings affected by voter-suppression calls in the last federal election is greater than first thought.

The patriarch of the modern-day conservative movement in Canada is calling for better ethical training for campaign workers in the wake of the robocall scandal.

Interim Liberal Leader Bob Rae claims robocalls used as a voter suppression tactic contributed to the defeat of Liberal candidates in at least 27 ridings in the last federal election.

With the Opposition fingering several Conservative-affiliated firms in the emerging election calls controversy, the House of Commons agreed unanimously Monday to report any evidence of illegal voter suppression tactics to the authorities.