Just to share my two-cents (and if it helps at all), I also interpreted "representative" a little more literally. To keep with the American President metaphor, both essentially have goals in doing things for their people, so while Jamie makes things run smoothly, I also envisioned him as being someone who signs off on papers and sees projects and goals go through (not necessarily laws, but, say, more efficient checks during trade seasons, a higher standard of efficiency and quality among peacekeepers, added protection to certain areas of Leionas should something potentially dangerous or terrorist in nature occur, ect.)
Of course I could be wrong xD; But since the primary concern of the Military Representative is protecting the people, and since this is a political position, I couldn't help but imagine this job have it's fair share of goal-oriented opinions along with standard procedure. ^^