Federal MP Clive Palmer says a robbery at an advertising agency he uses has a "bad smell of dirty politics" about it.

The founder of Palmer's United Party says three computers were stolen from the Brisbane business on Wednesday.

He says they contained political material and ads he was planning to use in Western Australia and Tasmania.

Police are investigating but Mr Palmer says he suspects his political opponents were involved.

"I think it is but I don't know from who," he said.

"It seems too coincidental that the election would just be called and we are finishing our production and we just lose everything."

WA's Senate results from the September election were declared void earlier this month by the High Court sitting as The Court of Disputed Returns after about 1,400 ballots disappeared during a vote recount.

The state's residents will go back to the polls on April 5, to re-elect six Senate positions.

Mr Palmer, the Member for the seat of Fairfax on Queensland's Sunshine Coast, says he is now "flat out trying to decide how we launch our campaign in WA".

"I had to come back from Parliament to Queensland," he said.

"I had discussions with the advertising agency and we have got to decide whether we produce new ads or change our schedules.

"It's a little bit of chaos, really."