If Boris Johnson wants to win, he needs to talk less about sovereignty and more about the economy

David Cameron’s renegotiation does not seem to have persuaded voters to switch to the Remain camp, writes Matthew Goodwin, and a number of developments have gone the Leave campaign’s way: Turkey’s possible accession to the EU, Boris Johnson’s commitment to Leave, and the failure of the Labour party to make an emphatic case to Remain. However, Johnson’s stress on sovereignty is unlikely to sway much of the electorate, who are more interested in whether a Brexit would damage Britain’s economy.