Can the government defy history and return Eden-Monaro to 'bellwether' status?

Fire ravaged their beautiful bush and coastal lands and claimed homes. Just as the rebuilding started, the coronavirus stopped the tourist industry climbing back to its feet.

Travel restrictions have meant there haven't even been the usual dollars from Canberrans who own holiday houses around the seaside areas. Now the coming snow season looms as financially bleak.

Amid all the pain, Eden-Monaro's voters wouldn't welcome a fractious byelection. But they'll be understanding about what's triggered it.

Their popular local member, Mike Kelly, has had his own months of hell, with multiple operations and medical procedures due to health issues arising from his military service in several postings.

As an emotional Kelly - who has respect across the political divide - told a news conference, he's just not able any more to service a seat requiring much driving. He apologised to constituents for causing a byelection at this time.

Neither Anthony Albanese nor Scott Morrison would particularly want a test of strength right now. Byelections in marginal seats are unpredictable; a win can be gold, a loss a minor or major setback. Predictably, both leaders are trying to manage expectations down.

Morrison has had a personal polling boost from his handling of the virus crisis, although the Coalition and Labor remain neck and neck. Apart from narrow politics, his good ratings are coinage when the government has to make hard decisions, or appeal for community patience. He doesn't want to lose any shine now.

What if Labor holds the seat? That would suggest people aren't translating their praise for the PM's crisis management to wider endorsement of the government.

On the other hand, what if the ALP loses, when history is on its side? As everyone keeps saying, a government taking an opposition seat at a byelection last happened a century ago.

A loss would lead to soul searching in the ALP, and reinforce the doubts held by Albanese's critics.

If the Liberals or Nationals won the seat, it would take Morrison's majority from three to five (that's including the speaker, who has a casting vote).

What if the victor was not a Liberal, but NSW Deputy Premier John Barilaro, leader of the state Nationals? Barilaro (sounding a little less gung ho on Friday than on Thursday) is considering over the coming days whether to run. He's frustrated the Liberals, unsurprisingly, are insisting on contesting.

Barilaro is a firecracker, with strong views and a loud voice. His arrival in Canberra would unsettle Deputy Prime Minister Michael McCormack. Barilaro wouldn't take the gamble of seeking to switch parliaments if he didn't have a lot of ambition.

Eden-Monaro is an electorate with a bit of everything, stretching from the regional centre of Queanbeyan, a dormitory for Canberra, through farming lands and mountains to the coast. From 1972 to 2013 it was hailed as a "bellwether", going with the government of the day. Kelly, who held it from 2007-13, broke that link when he won it back in 2016.

As ABC electoral analyst Antony Green points out, as a bellwether "it is a strangely unrepresentative seat. Outside of the ACT, Eden-Monaro has the nation's highest proportion of residents employed by government, reflecting the large public service population in Queanbeyan, as well as a large number of residents serving in the military".

Personal standing is important in this seat. Kelly has had a strong personal vote. Barilaro, who holds the state seat of Monaro, covering Queanbeyan, had a 52 per cent primary vote at the last NSW election, which shows his individual pull given the nature of the town is hardly usual Nationals heartland. In contrast, the Nationals polled 7 per cent in Eden-Monaro in 2019.

Another well-known local, Andrew Constance, has been talked of for the Liberals. Constance, the NSW Transport Minister, holds the state seat of Bega; he came especially to the fore during the bushfires, when he was critical of Morrison's performance.

Constance wouldn't run if Barilaro did, and probably wouldn't do so regardless. Constance's house, for which he fought in the bushfires, is in the federal seat of Gilmore, and he'd be reluctant to move.

Also mentioned is Liberal senator Jim Molan. He's a local, an ex-military man, and a skilled reaper of votes. In the mix as well is Fiona Kotvojs, who ran Kelly close at the last election.

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Labor will run Kristy McBain who, as mayor of Bega, starts with good support in that part of the seat. She will campaign with a "community"-centred approach; "at the moment, my community is being left behind," she said on Friday.

The Coalition considers her a formidable opponent who could have broad appeal. Research is presently being done on the conservative side on how preferences might go in a three-way contest.

Questioned about issues, Kelly put climate change centre-stage for Labor. More intense weather patterns and fires have given the climate issue a very practical face in Eden-Monaro. Labor will push the argument that with the virus, the government acts on the science - it should do the same on climate.

High on voters' agendas will be jobs, reconstruction after the fires, and services. It's a seat where the locals look for tangible results from their MPs, federal and state.

The virus will add a twist to campaigning. Albanese said he expects Speaker Tony Smith to announce the date of the byelection in the parliamentary week of May 12-14. He anticipates it would be held late June.

How much the leaders will be able to get about the electorate physically is a moot point.

Morrison had an unhappy experience there in January, when he tried to shake some hands in Cobargo. "Well, he won't have the handshake problem at the moment," Albanese quipped on Thursday.