The federal Liberals are gunning to turf out Lyons Labor MHR Brian Mitchell at the 2022 election.
"Our government will be looking to win additional seats across the country, including here in Tasmania where Labor-held seats are clearly vulnerable," Aged Care Minister Richard Colbeck said.
"MPs like the member for Lyons should take note of the desire of the electorate for a low-taxing government and support the government's tax cuts rather than to continue with the high tax and high spend position that the Australian people so clearly rejected."
He was speaking after Labor mistakenly emailed an internal "target seat media summary" to The Advocate.
It listed media headlines from 17 media outlets across the country, including The Advocate and The Examiner, and made clear Labor was planning to work hard to regain Tasmanian seats Braddon and Bass, which it lost to the Liberals in the May election.
Mr Mitchell survived in Lyons.
Senator Colbeck said: "A big part of the support the Liberals received at the last election was our focus on delivering for all Australians, unlike Labor, who are focused on inner-city Sydney and Melbourne."
"Labor clearly has a problem connecting with families in the regions and the suburbs."
Mr Mitchell said that was rubbish.
"Funding cancer patients, that's not an inner city issue, penalty rate relief, that's not an inner city issue," he said.
He said Labor attracted good votes in the suburbs and regions, but knew it needed to do more.
"Labor's policies will be reviewed, of course, following the result," he said.
He described Senator Colbeck's comments about tax as ridiculous.
"If the Liberals split the bill and put tax cuts for average income earners to the parliament, we will back them in without blinking," Mr Mitchell said.
"He knows that."
He said Labor would consider its position on cuts for higher income earners.
"They would benefit people like him and me, but people on the tools, in the shops or out on the farms aren't going to benefit one bit from tax cuts for high earners," Mr Mitchell said.