Matt Canavan could attempt a switch to the House of Representatives after a colleague announced her looming retirement, as a leading pollster said the Nationals leader had a “zero per cent” chance of holding his Senate seat if the One Nation polling surge remains unchanged.

Veteran National MP Michelle Landry on Friday announced she would not recontest her Queensland seat of Capricornia, around Rockhampton, at the next election.

Responding to speculation that Pauline Hanson could attempt her own switch to run in that seat, Landry said One Nation was “not very pleasant” and criticised the party’s “obnoxious” cartoon videos .

“I think they need to pull their heads in,” Landry said of One Nation .

There has been heavy speculation Canavan will run in Capricornia . Canavan earlier this month said he would do “whatever it takes” to hold Capricornia, telling Sky News: “if I’m required, if it is required to keep a seat, to hold one more seat in the lower house somewhere.…