By Stefan Boscia After vowing she was a “fighter” today, Liz Truss’ premiership looked more unstable than ever following the resignation of key figures and a shambolic vote in parliament late tonight. Chief whip Wendy Morton and deputy chief whip Craig Whittaker resigned tonight after a Labour vote on fracking, which allegedly saw senior Tory MPs physically manhandling and bullying their colleagues to get them to vote with the party line. Home secretary Suella Braverman was also sacked earlier in the day for a security breach, sparking an attack from the right-winger on the embattled PM. Brave…