Four weeks into the federal election campaign and less than 24 hours after two candidates resigned over shocking social media posts, another two federal election candidates are under scrutiny.

On Saturday, media reports emerged that the Canberra Liberal candidate Mina Zaki is facing questions about whether she properly renounced her Afghan citizenship, while Labor’s Durack candidate Sharyn Morrow is in trouble over anti asylum-seeker social media posts from 2013.

On Friday morning, the Liberal candidate for Lyons in Tasmania Jessica Whelan was forced to resign over a series of anti-Muslim posts.

By lunchtime, Labor’s Melbourne candidate Luke Creasey quit after being exposed over fresh Facebook “jokes” about rape, group sex and lesbians. He jumped before he was pushed, resigning just after 1pm – and just after Labor leader Bill Shorten ordered a full review of Mr Creasy’s social media posts.

According to The Guardian on Saturday, Ms Zaki declared she had renounced her Afghan citizenship on April 16, but the document she provided to the Australian Electoral Commission and Afghan citizenship law both suggest an additional step is required for complete renunciation.

On her eligibility checklist she identified that both her parents and grandparents were born in Afghanistan and that she held Afghan citizenship.

Prime Minister Scott Morrison dismissed concerns about the eligibility of his Canberra candidate over her Afghan citizenship, saying he has been assured Ms Zaki has all the necessary paperwork.

#auspol #AusVotes2019 Another day, another questionable Liberal candidate. Do they think S44 of the Constitution starts with "Liberal Party candidates excepted.."? Liberal candidate Mina Zaki's eligibility to sit in parliament questioned https://t.co/BaTeg67Cbr

— Gary Fallon (@GaryFallon2) May 3, 2019

In 2018, the High Court ruled – in the midst of the dual citizenship crisis of the 45th Parliament – that the “reasonable steps” defence for renouncing foreign citizenship was insufficient.

This is the first election where all candidates are required by the AEC to fill out an eligibility checklist declaring whether they have any issues, such as bankruptcy or dual citizenship, that could put them in breach of section 44 of the constitution.

While the Canberra seat is notionally held by Labor on a 12.9 per cent margin, uncertainty about another candidate’s eligibility will rock the Liberals who have already lost nine candidates since the election was called.

Meanwhile, Labor is under pressure to disendorse their candidate for the Western Australia seat of Durack over anti-asylum seeker posts on social media.

The West Australian reported that Sharyn Morrow made her comments on Facebook in 2013 in response to a riot at the Nauru detention centre.

“These trouble makers should be sent back to where they came from, they do not deserve our charity. When will we see a government that understands charity begins at home.”

EXCL: Another candidate has been embroiled in unfortunate social media posts with Labor candidate for Durack Sharyn Morrow posting on Facebook that refugees should “go back to where they came from” and welfare recipients should just get a job https://t.co/BUC2OhvQ4m pic.twitter.com/sIsvifS5GC

— Lanai Scarr (@lanai_scarr) May 3, 2019

Questioned by reporters about Ms Morrow’s comments shadow treasurer Chris Bowen said it was the first he’d heard of her remarks.

“We have processes to look at these things. We would need to look at that closely,” he said.

Environment minister Melissa Price holds the seat of Durack on a margin of 11.1 per cent.

The Liberals have already lost lower house hopefuls Peter Killen and Jeremy Hearn this week, while Labor lost NT senate candidate Wayne Kurnoth, all because of online posts.

So far, 15 candidates have fallen by the wayside for a variety of reasons, including dual citizenship and inappropriate online comments.

Nationals senator Bridget McKenzie said that all parties would be examining their processes after the election, including candidate endorsement.

“All parties have been struggling with candidates that have not quite met the mark for both the parties they choose to represent but also the broader Australian public,” she told the ABC.

-with AAP