A woman once described as "the next Pauline Hanson" could snatch another Senate seat for One Nation – restoring Senator Hanson's bloc of four – if the High Court heeds the party's call to disqualify Jacqui Lambie's replacement.

One Nation anti-Muslim campaigner Kate McCulloch could be the big winner from the section 44 fiasco that eliminated Ms Lambie and now threatens the No.2 on her Tasmanian Senate ticket, Steve Martin.

Kate McCulloch has been described as "the next Pauline Hanson" - and could soon seize a Senate seat. Credit:Ben Rushton

Despite winning only 141 first preference votes at the 2016 election, Ms McCulloch is considered the frontrunner to replace Ms Lambie if the court agrees that Mr Martin has an "office of profit under the crown" because he serves as a councillor and mayor in Devonport.

As One Nation defector Fraser Anning officially confirmed he was leaving the party to sit as an independent, lawyers for Ms McCulloch were fighting to win back a spot for One Nation.