The Muslim Council of Wales have said they are "extremely concerned" about the Trump administration's "Muslim ban" and that "we must all be vigilant of the slowly creeping fascism."
President Trump signed an executive order on Friday, temporarily banning refugees and citizens travelling to the States from seven mainly Muslim countries, to stop "radical Islamic terrorists".
The Muslim Council are calling on politicians to rally against the ban, which could affect UK citizens born abroad.
Citizens from Iraq, Iran, Libya, Somalia, Sudan, Syria and Yemen will be affected by the border ban.
US President Donald Trump has told reporters in the Oval Office that his executive order curbing immigration into the United States is "not a Muslim ban".
He added: "It's working out very nicely. We're going to have a very, very strict ban and we're going to have extreme vetting, which we should have had in this country for many years.
The First Minister has told ITV News that the President's order has diminished "not just the United States, but the West as a whole" and that he will be raising the issue with the Prime Minister tomorrow.
Prime Minister Theresa May has said she does "not agree" with the ban, and will step in if it affects Britons.
She arrived back in the UK from a visit to Turkey amid anger after she refused to condemn the controversial ban.
She's said 'the United States is responsible for the United States' policy on refugees."
The Foreign Office say they are working with other government departments to investigate the impact of the ban.