Bill Shorten appears to find a midday oyster and shot of gin much easier to stomach than any political deals with Clive Palmer.

The opposition leader threw back the delicacies at Hobart's Salamanca Markets on Saturday during his first campaign visit to Tasmania.

Mr Shorten was in town to commit $120 million towards local tourist attractions, including $50 million for the MONA museum.

He also threw a fiver into a young busker's hat before gnawing on a butter chicken curry.

Mr Shorten got a rude shock when he was stopped in his tracks by a punter who called him a "prick".

But all was forgiven when the woman admitted she had mistaken him for Scott Morrison.

Standing alongside MONA's founder David Walsh, a professional gambler, Mr Shorten urged voters not to roll the dice on Clive Palmer next month.

He is not denying Labor officials have met with Mr Palmer to discuss trading vote preferences.

But he says Labor will not agree to a swap while the tycoon's sacked workers are still owed money.

"If there have been conversations to find out what Mr Palmer is up to, well, that is as it is," he told reporters at the Museum of Old and New Art.

"But no deals from Labor."

Mr Shorten claimed the prime minister had revealed his poker face by inking a similar pact.

"Mr Morrison has shown his hand - a vote for Scott Morrison is a vote for Clive Palmer and Pauline Hanson," he said.

"There's an old saying, and I think that Mr Morrison is going to learn the truth, if you lie down with dogs, you will get up with fleas."

Labor's Anthony Albanese launched a full-throated attack against the "tosser" who could play kingmaker in Queensland next month.

"Scott Morrison had a choice between standing up for ripped off workers or sucking up to a tosser who ripped them off and he chose the tosser - he chose Clive Palmer," Mr Albanese said.

As the battle brews over preference deals, the prime minister has picked a rare pre-election fight over national security laws.

Mr Shorten has agreed to pass the foreign fighter laws in the first week of a new parliament.

He blamed Mr Morrison for the legislation - preventing foreign fighters from entering Australia for up to two years - being stalled.

"If it wasn't because of a work-shy and lazy conservative government these laws may well have already been passed," Mr Shorten said.

"We've got a unanimous position, both Labor and the others, so there's no reason why we couldn't do it in the first week back.

"If Mr Morrison is looking to blame someone for a failure of national security, he should buy a mirror, because that's the face he should blame."

Labor controls four of the five lower house seats in Tasmania, with three in contention come May 18.

The opposition holds Braddon by just 1.7 per cent, and knows the electorates of Bass and Lyons also turn on a dime.