He said Mr. Roberts must take full responsibility for the undertakings within his Ministry.
Mr. Warner said that the Sport Minister’s attempts to pass the blame is nonsense.
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A report on the LifeSport programme was read in Parliament on Friday, resulting in calls for the Sport Minister to step down.
Mr. Roberts has said he will not step down as he had no authority in the managing of the programme.
The ILP Chairman said it is now up to the Prime Minister to dismiss him from Cabinet.
Mr. Warner has also dismissed claims that this situation is similar to his refusal to resign amidst FIFA bribery allegations.
He said the two situations are like apples and grapes.