Speaking to a crowd of more than 1,000 at Wright State University, Vice President Joe Biden began his speech on a solemn note - paying tribute to U.S. ambassador to Libya, J. Christopher Stevens and three other embassy staff killed in an attack in Benghazi on Wednesday. "Chris and his colleagues were exemplars of our nation's commitment to freedom and to justice, and the partnership with nations and people around the world in order to make us safer here at home," Biden said. Bidenâs opponent, GOP vice presidential candidate Paul Ryan was in Clermont county, where he continued his criticism of the President for the nationâs stalled recovery. "It's gone from bad to worse. Look, there's no two ways about it: President Obama inherited a tough situation. But he didn't make things better." President Obama campaigns in Columbus and Cincinnati on Monday.