He said Labour delegates had chosen instead to select debates on "bread and butter issues" such as health and housing, and did not wish to divide the party over Brexit.
The Commission on Presidential Debates does not consult the campaigns when selecting debate moderators, according to its website.
In September, both Obama and Romney participated in the first candidate forums on the Spanish-language network Univision, after the Presidential Debate Commission selected debate moderators who all were white.
"I wanted to ask him, 'What is that all about?'" The Commission on Presidential Debates, the organization in charge of selecting debate moderators, has chosen only one woman besides Simpson since it took over the debate process in 1987.
But one adviser conceded tonight that in selecting debates that would be moderated by the journalist Tim Russert in one case and the talk-show host Larry King in another, Mr. Bush was guaranteeing that he would take questions from people who had quizzed him before, and with whom he felt familiar.
The amendment is expected to be selected for debate by the Speaker, John Bercow, in Wednesday's debate on the legislative programme.
The commission was informed well in advance of their selecting the debate dates," said Barbara Levin, an NBC spokeswoman.
Delegates are scheduled to decide on Friday whether a motion on Trident will be selected for debate on Sunday alongside other topics.
The conference committee selected for debate the motion with fewer backers, and decided the SLF motion should not go to conference at all.
None of these titles are selected without debate by studio executives and, in some cases, they are determined by focus group testing.
