Sen. Mitt Romney warned in his farewell address of those who "tear at our unity," urging America to uphold the nation's values as he capped more than two decades in public service.

My biggest surprise in the Senate has been how much I enjoy the other senators, on both sides of the aisle,” Romney, 77, said. Romney, who played a central role in negotiating bipartisan legislation during his lone six-year term in the Senate,

Utah Republican Senator Mitt Romney delivered his farewell remarks on the Senate floor Wednesday after serving just one term and choosing not to seek reelection. "I will leave this chamber with a sense of achievement.