The Lib Dem chief secretary to the Treasury was involved in a spirited ding-dong with the shadow chancellor in a joint post-Budget appearance on the channel. Alexander, accusing Balls of being "vague" on Labour's policies, stuck out his hand and asked Balls to shake it and agree to a election debate. "Perhaps you and I could debate this," he said. "A three-way debate, if you and I shake. Come on Ed, shake on it."
However Balls laughed and made sure his hands went no where near Alexander's grasp.
Alexander said: "I don't know why he is willing to sign up to a debate with George Osborne but he is running away from a debate with me."
On Sunday, Balls successfully ambushed Osborne on the Andrew Marr show into shaking his hand on a head-to-head chancellors debate.
Today, Balls told Alexander he was happy to take part in a debate with all the parties Treasury spokespeople, but he wanted a head-to-head with Osborne as well. "I want a debate with the two serious parties, the two parties where the chancellor will come from. I'm not going to let George Osborne off the hook."
Balls told Osborne on Sunday: "George is not a coward. David Cameron doesn't want a head-to-head with Ed Miliband but I'm very happy - I will have a head-to-head debate, just the two of us, the potential chancellors during the election campaign. He added: "You can say now - are you up for it?"
Budget 2015: The Main Points