The Liberal Democrat leader, Jo Swinson, has been toppled in her own seat, throwing her future at the head of the party into serious doubt after a dismal showing at the polls generally. Swinson, who started the campaign claiming she could be the next prime minister, lost in her East Dunbartonshire constituency to the SNP, a result that capped a disastrous night for her party. Though Lib Dem numbers in the Commons swelled before the election to 21, aided by MPs crossing the floor, the Ipsos Mori exit poll predicted the party winning 13 seats – only one more than...