The Liberal Party's disastrous performance in the Victorian election has put the Morrison government on course for a crushing defeat at next year's federal poll, as a brawl breaks out over whether Malcolm Turnbull's demise was to blame for the shock result.

Premier Daniel Andrews easily won Saturday's election following a surge to Labor in a swag of seats across the state, including marginal electorates held by the Liberals.

While Coalition figures blamed the loss on a poor campaign spearheaded by Opposition Leader Matthew Guy, they conceded leadership instability in Canberra was a significant factor with worrying implications for next year's federal election and the NSW election in March.

Party strategists believe the federal seat of Corangamite – the nation's most marginal – is a certain loss for the Coalition, along with Chisholm. Chisholm was the only electorate the Liberal Party won at the 2016 election. The current MP, Julia Banks, is leaving politics after sensationally alleging she was bullied during the Liberal leadership implosion in August.