Murder Blamed on Weather Underground Member Bernardine Dohrn Press Conference at 12:30 P.M. at National Press Club, Washington, D.C.

By CHRISTOPHER WILLS By Christopher Wills The Associated Press SPRINGFIELD, Ill. Scraping for any advantage in the campaign's waning days, John McCain and Barack Obama are introducing voters to a new cast of characters.

By Judy Keen CHICAGO -- Conservatives are stepping up efforts to turn 1960s radical Bill Ayers into a political liability for Barack Obama. This spring, Obama's links to Ayers briefly became a campaign controversy.

CHICAGO _ Bill Ayers long ago settled into a life of quiet respectability as a well-regarded professor of education and a much-published activist for better schools. With his Ivy League doctorate, 48-page curriculum vitae and liberal politics, he fits comfortably into Chicago's Kenwood neighborhood.

WASHINGTON _ Once again, a presidential campaign is refighting the 1960s.