All five Labour leadership contenders have backed extra powers for the Welsh assembly as they took questions from party members across Wales.
More than 300 members have quizzed Diane Abbott, Ed Balls, Andy Burnham, David Miliband and Ed Miliband at the Millennium Stadium in Cardiff.
Questions also covered public spending, changing the party and the Middle East.
It was the only official hustings in Wales, and Gordon Brown's successor will be announced in September.
The winner will be unveiled at the Labour conference.
The candidates are fighting for the votes of Labour and union members, having been nominated by MPs.
Labour's new leader will be chosen by an electoral college.
That system consists of Labour MPs and MEPs, party members and members of affiliated unions and other affiliated organisations.
Labour AMs currently do not have the same level of say on who becomes UK leader as MPs and MEPs.
After answering questions, each candidate was given the chance to lay out his or her credentials.