RE: Valero Bill Klesse Letter Keystone P/L
I Think this is a real Valero letter – here is link to it at Valero Website below.(They also have less confrontational version posted at website):
Voices for Valero = http://www.valero.com/OurBusiness/VoicesforEnergy/Pages/default.aspx ; and
Your Bill Klesse leter = http://www.valero.com/OurBusiness/VoicesForEnergy/Documents/Barack%20Obama%20Letter.pdf
So you at least have thier website verification on letters sourcing!