Henderson confident of holding Corangamite

Liberal MP Sarah Henderson is "quietly confident" of retaining the marginal Victorian seat of Corangamite.

Earlier on Saturday night, party powerbroker Michael Kroger declared her the winner, but Ms Henderson was reluctant to claim victory despite being ahead on the two-party preferred vote.

"There is still a lot of pre-polls to come in but the signs are very, very good and looking positive," she told Channel Nine.

The firefighters pay dispute between CFA volunteers and the Andrews Labor state government played a big part in the outcome in the Geelong area seat, where the Wye River bushfire caused devastation over Christmas.

"Frankly, what Daniel Andrews and Bill Shorten have tried to do - a union takeover of the CFA - is absolutely disgraceful," she said.

Labor frontbencher Anthony Albanese conceded the CFA issue had had an impact on Labor's performance in several Victorian seats, including McEwen, La Trobe, Ballarat and Bendigo.

But he said Ms Henderson had also been a very effective local member.