US President-elect Barack Obama will introduce rules to restrict the role of lobbyists as he shapes his administration, says a senior official. Transition chief John Podesta said Mr Obama would introduce "the strictest and most far reaching ethics rules of any transition team in history". He promised the "most open and transparent" ever handover of power. Mr Obama's defeated Republican rival John McCain, meanwhile, cracked jokes about his defeat on a US talk show. In his first post-election TV interview, Arizona Senator McCain said that since being trounced by Mr Obama in last week's election he had been "sleeping like a baby". "I sleep two hours, wake up and cry," he added, repeating a gag he made after losing to George W Bush during the Republican primaries in 2000. Appearing on NBC's The Tonight Show with Jay Leno, Mr McCain ruled out another run for the presidency, saying: "I wouldn't think so, my friend. It's been a great experience and we're going to have another generation of leaders come along." He also said his running mate Sarah Palin inspired people and predicted she "would play a big role in the future of this country". Both Mr Obama, who takes office on 20 January, and Sen McCain railed against lobbyists during the election campaign, accusing them of peddling favours and influence to sway Capitol Hill lawmakers in a culture of corruption. At a briefing in Washington, Mr Podesta told reporters Mr Obama had "pledged to change the way Washington works and curb the influence of lobbyists". Under the new measures, Mr Obama will not allow lobbyists actively petitioning the federal government to work with the transition, said Mr Podesta.