I am in the process of gathering letters of recommendation after having been out of school for a couple of years, and I have read that it is unwise to seek letters of recommendation from politicians because it could raise ethical questions. A couple of years ago I interned at a non-profit, and I would like to ask my supervisor for a letter. Since my internship, my former supervisor has left and is now a staffer for a US congressman (not in a district even close to mine or to any school I plan on applying to.) Is it still wise to ask him since he is now afiliated with a politician?