George Galloway is facing a House of Commons motion against him for taking part in Celebrity Big Brother.
Galloway imitated a cat on the programme
The motion, authored by Labour MP Martin Linton, expresses "dismay" at his decision to "absent" himself from the House to participate in the show.
Respect MP Galloway missed a debate on the London Crossrail scheme, said to have "direct consequences" for his Bethnal Green and Bow constituents.
The second set of nominations, taking place later, are revealed on Tuesday.
Actress Rula Lenska has been given a special mission, which if successful, will give her undisclosed "special powers" at the second round of nominations.
But if she fails, the 57-year-old will find herself automatically facing the public vote.
In the first round of nominations, politician Galloway and singer Pete Burns accrued enough votes from their fellow housemates to be put up for the vote.
Non-celebrity Chantelle is tipped to win the series
But on Friday, model Jodie Marsh became the first evictee from the house. The second eviction is due to take place on Wednesday.
Bookmakers William Hill has installed non-celebrity Chantelle Houghton as the favourite to win the entire series, closely followed by 23-year-old Preston, lead singer with band The Ordinary Boys.
US basketball star Dennis Rodman and Faria Alam, who hit the headlines for having a relationship with England football coach Sven Goran Eriksson, are least likely to win the series.
Veteran DJ Sir Jimmy Savile was a guest of the house at the weekend, granting housemates' wishes in the style of his long-running programme Jim'll Fix It.