Rishi Singh has been described as “desperate and pathetic” after accusing Labor of smuggling migrants into the UK “on the same side as criminal gangs”.
Senior Labor MPs have slammed the Prime Minister over a tweet sent from her official account on Tuesday.
Mr Sink shared a link to a Daily Mail story alleging lawyers had helped people claim asylum based on evidence they knew to be false.
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He said: “That’s what we’re up against.
“The Labor Party, a subset of lawyers, criminal gangs – they are all on the same side, pushing a system of exploitation that profits from bringing people into the UK illegally.
“I have a plan to stop him.”
Shadow Attorney General Emily Thornberry accused Mr Sink of disrespecting the role of prime minister.
She said: “Normally, I try to maintain a sense of respect for the position of Prime Minister, but it’s impossible when a working man is willing to degrade it like this.
“What a desperate attempt to turn your back on your desperate failures. Absolutely pathetic.”
Labor frontbencher Jim McMahon, shadow secretary of state for environment, food and rural affairs, wrote: “When all else is lost, the only place you have is the sewer.
“Poor yes. Desperate and pathetic beyond sync.”
Labor MP Chris Bryant, who chairs the Commons standards committee, said: “He has touched a new depth in his desperation.
“My political opponents are not enemies, or enemies of the people or ‘criminal gangs’. He disgraces his position and forgets the act (sic) as a UK Prime Minister who does not seek to sow division.”
Tory figures also criticized the comments, with Tim Montgomery, founder of the Conservative Home website, saying the remarks were “unbecoming of the Prime Minister”.
However, Mr Sink’s tweet received support from some Conservative MPs.
Energy Security Secretary Grant Shepps said: “Labour seems to want criminal gangs and fraud lawyers to decide who comes to the UK – that’s why they tried to block every vote on stopping the boats.”
Labor has said it opposes the government’s illegal migration bill. Tries to stop people. who cross the Channel by claiming asylum – saying the legislation is not credible and will not act as a barrier to small boat crossings.
His main criticisms of the controversial legislation are that there is insufficient capacity to detain asylum seekers, there is no return agreement with the EU and Rwanda’s deportation scheme has so far failed to get off the ground.
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The party has laid out its plan to reduce small boat crossings if it wins the next election, including a crackdown on criminal smuggling gangs through a new cross-border police unit.
The tweet from Mr Sink followed a report in The Times that he was preparing to launch a more aggressive political campaign in an attempt to reverse Labour’s lead in the polls with divisive policies on crime, immigration and transgender rights.
Labour’s election campaign has also come under scrutiny as both parties step up attacks ahead of the next election.
Earlier this year, Sir Keir Starmer was accused of “gutter politics” and his own MPs criticized an advertisement which accused the Prime Minister of not wanting to see child sex abusers in prison.
At the time, the party defended the social media ad, saying it was “absolutely right to take the gloves off”.