2017 -Give a Reason why the Campaign and Manifesto was, and wasn't Important

-The Conservatives had to U-Turn on its Manifesto Commitment on Health and Social Care Reform, after its Policy was called the 'Dementia Tax' [People need to pay 100K for Social Care] Opinion polls had Narrowed therefore -But the Salient Issue of Brexit had Violently changed the Voting Pattern far more than its Campaign and Manifesto