It states it all about the man when you consider he Quit the Labour Party when things got tough.
He then joined the Change Party on its formation but quit them when things got difficult.
So, he now joins the Lib Dems, but no doubt will quit them if things do not go his way entirely, or things get tough in that party.
Therefore, his record demonstrates he is hardly a person who "stands and fights his corner", but one that runs off whenever he feels there is a battle ahead.
Perhaps he should now also change his name from Chuka Umunna to Chuka TheMoaner.