Adroitly combining humor and intimate drama, Joe Tynan joins that list of exemplary Washington-set pix, including Advise and Consent and The Best Man.In large part, the credit goes to Alan Alda, whose portrayal in the title role is no less complex and multi-faceted than his screenplay. Joe Tynan is a familiar political figure: the young, handsome liberal Senator who rides upward on the coat-tails of a few big media victories. Alda assumes the pasted-on smile, the hearty handshake and breezy confidence of a politico with immense ease. He seems to have been born for the role. Less often explored is the price paid for such double-edged success, and this is where Joe Tynan excels. As Alda’s intelligent and frustrated wife, Barbara Harris gives the performance of her career.