US district judge to grant class action status to a lawsuit seeking to represent any babies whose citizenship status would be threatened

Hello and welcome to the US politics live blog. I’m Tom Ambrose and I’ll be bringing you the latest news lines over the next hour or so.

We start with news that a federal judge will consider today whether to prevent president Donald Trump’s administration from enforcing his executive order limiting birthright citizenship after the US Supreme Court restricted the ability of judges to block his policies using nationwide injunctions.

Donald Trump released an intemperate letter to Brazil’s president imposing a 50% tariff and complaining about the prosecution of his friend, former president Jair Bolsonaro, for the crime of simply trying to stay in office despite losing an election and then inciting a riot by his supporters to derail the transfer of power.

Brazil’s current president, Luiz Inácio Lula da Silva, rejected Trump’s demand that the charges against Bolsonaro be dropped, and pointed out that Brazil has an independent judiciary and does not, in fact, have a trade imbalance with the US.

Brazilians mocked Bolsonaro’s potential successor for supporting Trump, by remixing video of him in a MAGA hat on social media.

Amid concerns that a wave of staff reductions threaten the core missions of Nasa, Trump announced that he is asking the transportation secretary, Sean Duffy, to also serve as interim administrator of the space agency.

Trump complimented the president of Liberia on his excellent English, revealing that he is unaware of that nation’s close ties to the United States, as a home for freed slaves.

The US supreme court maintained a judicial block on a Republican-crafted Florida law that makes it a crime for undocumented immigrants to enter the state.