So it looks like the coalition is finishing the year just as it started in May, with a Liberal Democrat resignation. Vince, for whatever reason (stupidity, tiredness or planned) has not only voiced his concern over the direction the coalition is taking, but also over inflating his own self worth.
History tells you that no-one is indispensable and Vince Cable's latest opinions are not so much a problem for the coalition but more of a problem with his own credibility.
But more importantly do these latest revelations about Vince Cable open the door for David Laws to return to front line politics? Only time will tell.