There is very little direction on how certain a Senator must be in order to find the President guilty. Without parameters on how this decision is to be made, it is nothing more than a popularity contest.
In Tulsa, Oklahoma; a pedestrian is not legally required to produce and hand over state-issued identification to a police officer during a casual or consensual encounter. This is not an absolute right, as the legal obligation to identify yourself hinges entirely on the nature of the police interaction.