Thousands of protesters have gathered in London in the latest mass demonstration against the travel ban and Prime Minister Theresa May's relationship with the newly-elected president.
More than 11,000 people are estimated to have joined the demonstration outside the US Embassy in Grosvenor Square, Mayfair.
And yet, as the protest began, Trump defended his refusal to accept refugees and ban on people travelling to the US from several Muslim-majority countries - claiming Middle Eastern countries agree with his controversial new rules.
Trump remained defiant tweeting: "When a country is no longer able to say who can, and who cannot , come in & out, especially for reasons of safety &.security - big trouble!
"Interesting that certain Middle-Eastern countries agree with the ban. They know if certain people are allowed in it's death & destruction!"
"The opinion of this so-called judge, which essentially takes law-enforcement away from our country, is ridiculous and will be overturned!"
A number of groups came together to organise the demonstration - Stop the War Coalition, Stand Up to Racism, Muslim Association of Britain, Muslim Engagement and Development, the Muslim Council of Britain, CND, Friends of Al-Aqsa, The People's Assembly Against Austerity and Help Refugees Worldwide.
A Facebook group set up in advance of the event said: ”Trump's ban on Muslims must be opposed by all who are against racism and support basic human rights. Theresa May's collusion with Trump must end."
The latest protest follows many others throughout the world and comes after Trump issued an executive order preventing nationals of seven Muslim-majority countries entering the US for three months.
He said the move was aimed at combatting terrorism but it has been widely reported that many of the refugees left stranded at airports last weekend were fleeing terrorism themselves.
In the latest twits to the saga, a judge has put a nationwide block on the 'Muslim ban' with opponents claiming the ruling "shuts down the executive order right now".
Judge James Robart issued a temporary restraining order on Trump's order which banned refugees and nationals from seven majority-Muslim countries.
Robart said for the President's to be permitted it should be "based in fact, as opposed to fiction."
The ruling represents the biggest challenge yet to Trump's action, although his administration could still appeal the ruling and have the policy upheld.
Judge Robart's ruling is effective immediately, suggesting that travel restrictions could be lifted straight away.
He is expected to issue a full written ruling over the weekend.
US Customs and Border Protection alerted airlines that the US government would quickly begin reinstating visas that were previously canceled, and that refugees in possession of US visas will be admitted as well, an airline executive said.
Washington Governor Jay Inslee celebrated the decision as a victory for the state, adding: "no person - not even the president - is above the law."
(The Daily Mirror)