Britain’s Lib Dems are having a mini-meltdown. Here’s what’s going on.

LONDON — The Liberal Democrats used to watch their rivals indulge in messy factional squabbles with glee. Now they are scrambling to project an image of unity. Britain’s third-largest Westminster group could hold significant power after the next election if no party wins a majority of MPs and Prime Minister Andy Burnham is casting around for a deal. But for now, the focus is on weathering an internal storm in the centrist outfit. MPs rallied around their leader Ed Davey this week at a marathon four-hour meeting — held days after one of his frontbenchers resigned in an ill-fated attempt to oust the party chief.