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-- a move that his lawyer, former New York City Mayor Rudy Giuliani, has long insisted is the main reason why the President shouldn't even consider sitting down with Robert Mueller. But what President Donald Trump is describing above isn't a perjury trap at all.Read MoreLet's define the term first : A perjury trap is when a prosecutor asks questions of a witness knowing that witness will lie. In order to lure someone into a perjury trap, you have to know two things beyond any doubt : 1) The facts behind the question and 2) That the person you are asking the question of is going to lie about the facts.It's not at all clear that's what would be going on with a Mueller-Trump sit-down -- on matters related to Comey or anything else. And in fact, the scenario President Donald Trump lays out isn't even close to a perjury trap. Instead it's a.