Home Secretary Sajid Javid has condemned “naked populism” in the US and described chants made at a Donald Trump rally as “completely unacceptable”.
Mr Trump disavowed chants of “send her back” aimed at Democratic congresswoman and US citizen Ilhan Omar.
Mr Javid said he was “deeply concerned” about polarisation in parts of the US.
In a speech, he also warned of racism propelling extremist politicians to power around the world.
Speaking about the chants, Mr Javid said: “This is going on in the US today. Imagine if people were saying to me “send him back”.