Why is Labour unable to end its antisemitism crisis?

Politics Explained: The crisis has dragged on for most of Jeremy Corbyn’s time as leader, so why can’t Labour make it go away?

The row over antisemitism in Labour exploded back into the headlines last week after the decision to allow Chris Williamson to rejoin the party after a four-month suspension.

The saga over anti-Jewish abuse in the party has rumbled on for almost three years, erupting every now and again, and shows no sign of settling down.

Some senior figures in Labour, including John McDonnell, the shadow chancellor, are desperate to put an end to the row, believing it is affecting the party’s chances of winning power.