Joe Tynan is a liberal U.S. senator from New York with possible presidential ambitions. For the time being, he is weighing the nomination of a potential Supreme Court justice, with the elderly Sen. Birney urging him strongly to support the nominee. Tynan is married, with two children, and his frequent work-related absence is an occupational hazard tolerated by wife Ellie, who is busy studying for a new career as a therapist. When he travels to Louisiana to investigate the nominated judge, he encounters labor lawyer Karen Traynor, who knows of evidence revealing the nominee to be unfit. Their time together results in Tynan and the married Karen beginning a romantic affair. While back in Washington, D.C., engaging in a friendly rivalry with Southern senator Kittner and preparing for the party's upcoming national convention, Tynan begins to realize that Sen. Birney is suffering from a form of early dementia. Ellie, meanwhile, discovers his relationship with Karen, causing considerable friction at home. Tynan breaks off the affair, and makes amends to his wife as he delivers a speech at the convention.
of The New York Times wrote, "Alan Alda's Joe Tynan isn't altogether believable as a politician, but he's a warm, sensitive, intelligent character, around whom an uncommonly well-meaning movie has been fashioned." Dale Pollock of Variety wrote that the film "features a literate script, sensitive direction and a brace of fine performances by Alan Alda, Barbara Harris and Meryl Streep." Gene Siskel of the Chicago Tribune gave the film three-and-a-half stars out of four and wrote, "We all know that Alan Alda can act; the revelation in his new film, 'The Seduction of Joe Tynan,' is how well he can write. His script, set in the world of politics, is a pleasure to listen to." Sheila Benson of the Los Angeles Times stated, "'The Seduction of Joe Tynan' is at least a decent effort to look at the pressures at work on a rising young politician, both from within and without. Years from now, however, it may be best remembered as the first film to give Meryl Streep full rein for her luminous talents." Judith Martin of The Washington Post wrote, "Barbara Harris' superb and rounded characterization is only one of many deliciously funny-sad and authentic touches in this amazingly unstereotyped political satire." David Ansen of Newsweek called the film an "intelligent, beautifully acted cautionary tale about the conflict between the siren call of success and the responsibilities of a private life." The film currently holds an 86% rating on Rotten Tomatoes, based on seven reviews.
