After traveling with management, Piper Jaffray analyst Alexander Potter reiterates an Overweight rating on Navistar International (NAV) with a $44 price target. Any potential acquirer would use discounted cash flow to capture Navistar's potential for multi-year margin and market share growth, Potter tells investors in a research note. Even before last week's "media frenzy re-ignited take-out speculation," many investors had already believed Navistar would ultimately be acquired by alliance partner Volkswagen (VLKAY), the analyst contends. Potter adds that any Volkswagen bid below $44 per share would be too low. The analyst thinks Navistar shares "are too cheap."