Original sentence: In "exhaustive research" of the election, the American pollster Douglas Schoen and Oxford University academic R.Johnson believed it "beyond dispute" that Enoch Powell had attracted 2.5 million votes to the Conservatives.Johnson further believed that the votes Powell brought to the Conservatives were "quite possibly four or five million".Johnson later wrote that "It became clear that Powell had won the 1970 election for the Tories...of all those who had switched their vote from one party to another in the election, 50 per cent were working class Powellites.Not only had 18 per cent of Labour Powellites switched to the Tories but so had 24 per cent of Liberal Powellites"
Edited sentence: Heath's decision in 1968 to take on and defeat the far right in his own party had effectively been endorsed by the electorate in 1970.Johnson claimed that  Enoch Powell had attracted 2.5 million votes to the Conservatives, but most psephologists contend that Powell had no influence on the outcome at all as Edward Heath had previously sacked him from the shadow cabinet over his notorious Rivers of blood speech.Right wing historians like to infer that because the pro-Tory swing had been larger in the areas around Powell's own west midlands seat that this implied a special "Powell effect", but swings are traditionally bigger in the black country due to the region's high concentration of the historically volatile C2s (skilled manual workers).The American pollster Douglas Schoen and Oxford University academic R.The victory of the Conservatives in the 1970 general election was widely seen to have put an end to any realistic ambition that Powell may have had to lead the Conservative Party, and gave Heath a firm mandate to govern in his own one nation tradition of racial inclusiveness