Before he entered politics, Kentucky Republican Jim Bunning was an outstanding baseball pitcher who was inducted into the Hall of Fame. But so far the burly right-hander has struck out in his seven years in the Senate.

America's Best Senators Those who do, and don't, make a difference in the U.S. Senate The Best Senators Thad Cochran Kent Conrad Dick Durbin Ted Kennedy Jon Kyl Carl Levin Richard Lugar John McCain Olympia J. Snowe Arlen Specter The Worst Senators Daniel Akaka Wayne Allard Jim Bunning Conrad Burns Mark Dayton From the TIME Archive Nov. 5, 1979 The Kennedy Challenge More than a quarter century ago, TIME covered the presidential campaign of Senator Ted Kennedy, "the last of the Kennedy brothers, the youngest, the most vulnerable, the most thoroughly political"

Bunning's lackluster performance has created strains between him and the G.O.P. in Kentucky, according to Laurie Rhodebeck, a University of Louisville political-science professor. Having served Kentucky for 12 years in the House before moving to the Senate in 1998, Bunning exhibited bizarre behavior during his 2004 re-election campaign. He said his Democratic opponent, a child of Italian immigrants, looked like one of Saddam Hussein's sons. He refused to go to Kentucky for the campaign's only debate and took part instead from Washington. It was later revealed that he had read some of his answers in the debate from a teleprompter. He was returned to office by just two points in a state that President Bush carried by 20.