L to R: George Bush in a sack suit, William Clark in an Updated American suit (source: Ronald Reagan Presidential Library)
"This article came about as a reaction to the generally held opinion among internet denizens—and some writers—that the only true classic American style is the “traditional” Ivy League style. In my view, the Updated American style is as genuinely and legitimately American as the Ivy League style, reflected in the fact that it has become for all intents and purposes the standard American style for most American men."
Read this very informative article in its entirety:
The Paul Stuart Variation: Classic American Style