I can see two schools of thought on this one...
From a political perspective I can not remember a time when we have been a more divided country. The negative emotions from this Grand Canyon size divide between the left and the right have bled over into this attraction especially during the the last administration. For this reason I can see Disney removing the current president's speaking role simply to remove the distraction.
However, if Disney were to do this now all hell would break loose and it would be a PR nightmare for the mouse. It would take exactly one show for Jessie Jackson, Al Sharpton and the NAACP to pull out the race card and call for a boycott of all things Disney. Given the current economic climate I do not think that Disney will risk it.
Personally, I like the speech by the current commander in chief. Regardless of my personal opinion of whomever that that is it provides a link for the present to the past in the attraction.