GIBSON: Do you feel in any way responsible for what's happening?
BUSH: You know, I'm the President during this period of time, but I think when the history of this period is written, people will realize a lot of the decisions that were made on Wall Street took place over a decade or so, before I arrived in President, during I arrived in President.
In hearing it, I had corrected 'in' to 'as' somehow (assuming the transcript is right -- I don't see this in the video chunks online), but I can't get the 'during'. I don't know this as a dialect feature and it's an odd-sounding speech error somehow. But I do know it as a feature of non-native English. A Google search for "during I was" yields some results, but a lot clearly non-native English speakers.
What's going on here?