A by-election swing against the NSW government in a formerly safe Liberal seat could be a lesson about the power of independent candidates ahead of the federal election.
In doubt is the blue-ribbon seat of Willoughby in the heart of Sydney's north shore, which was held for 18 years by the hugely popular Gladys Berejiklian, as four by-elections were held on the weekend.
The former premier built a hefty margin of 21 per cent but the Liberal Party is facing a swing against it of more than 19 per cent.
