Just published: Mansfield and Dirksen: Bipartisan Giants of the Senate by Marc Johnson. “The U.S. Senate is so sharply polarized along partisan and ideological lines today that it’s easy to believe it was always this way. But in the turbulent 1960s, even as battles over civil rights and the war in Vietnam dominated American politics, bipartisanship often prevailed.” Mansfield and Dirksen: Bipartisan Giants of the Senate Amazon Kindle EditionJohnson, Marc C.