Now that all current federal politicians have disclosed their citizenship, and the citizenship of their parents and grandparents, all sides of the parliament have started pointing accusatory fingers at those they say should be referred to the High Court.

Politicians who may have been entitled to citizenship of a foreign power at the time of nomination at the last election may be ineligible to sit in parliament under Section 44.

The growing number of MPs facing citizenship questions raises the prospect of a "super Saturday" set of by-elections early in the new year, if the High Court finds the MPs were ineligible.

Prime minister Malcolm Turnbull has accused Labor of running a "protection racket" for several MPs who may have been dual citizens at the election. Prior to disclosure, Labor leader Bill Shorten had insisted that Labor's vetting process was thorough, however after the disclosures yesterday, the following Labor MPs are the subject of citizenship doubts: