D drew a check to the order of P. P took the check postdated. P knew that D was having financial difficulties and that the particular checking account on which this check was drawn had been frequently overdrawn. Do these circumstances prevent P from being a holder in due course? [Citizens Bank, Booneville v National Bank of Commerce, 334 F2d 257 (10th Cir); Franklin National Bank v Sidney Gotowner, 4 UCC Rep Serv 953 (NY Supp)]