So fixated are we now on the divisions between the two major parties that we forget how often internal divisions within one party or the other shape political outcomes. A rich history could be written of the conflicts that have sundered presidents and congressional leaders of the same party, in some cases friends who turned into bitter foes. The Texan Lyndon B. Johnson, who probably had closer ties with the Senate than any other president before or since, tangled with Dixiecrats on civil rights and then with northern liberals, including his former ally Eugene McCarthy, on Vietnam. In 1990, House Republicans, led by Newt Gingrich, attacked George H. W. Bush for cutting a budget deal with Democrats and helped doom his reelection bid in 1992. It was Republican legislators who stopped George W. Bush's attempt to reform immigration, helping wreck his second term.