The Conservative Party were critical of immigration from the Commonwealth during the 1950s and 1960s, culminating in the infamous Rivers of Blood speech delivered by leading Conservative MP Enoch Powell. Despite this, there have long been a small number of black conservatives. In recent years, the Conservatives have attempted to undo the long-standing conservative prejudices, by attacking racism and trying to cultivate more of a following amongst the black community. Compared to the United States, the racial divide in the United Kingdom is less pronounced along party lines, due to the difference in racial relations.