Six world powers are struggling to find common ground on how harshly to criticize Iran, reflecting the difficulties of presenting a united front at upcoming talks with the Islamic republic meant to coax it into reducing activities that could be used to make a nuclear weapon.

Interim Liberal Leader Bob Rae said a Liberal research bureau staffer was behind the 'Vikileaks' campaign that targeted Public Safety Minister Vic Toews and he offered an apology.

Liberal MP Justin Trudeau tells local Liberals he is confident they can rebuild their party and form government again.