All three mainstream leaders are now suffering from low ratings. All that has changed is that Cameron now joins Clegg and Miliband. Perhaps it was only a matter of time and adverse publicity. As Mike Smithson points out it is unprecedented for all three leaders to suffer from such disillusionment on the part of the electorate.
Yet, this may prove most dangerous for Miliband. With a Labour lead in the polls and an unpopular leader, the temptation to look for a more popular candidate will increase. An unpopular budget and a week that undermined notions of competence have wounded the Coalition. None of these indicate that we have faced a change in polling or a swing to Labour, when Galloway's victory points to increased volatility.