Shocking footage shows a Donald Trump fan being knocked to the ground outside Parliament.
The elderly man, who was in Parliament Square, can be heard shouting "Get off" in the clip.
He was surrounded during a protest against the US President's visit in Central London yesterday.
The pensioner was wearing a "Make America Great Again" - Trump's campaign slogan - baseball cap.
Other outraged demonstrators can be heard asking for calm.
One is heard saying: "Have some respect, he is a senior citizen."
Another said: "When you act like that, you act like Donald Trump."
Anti-Trump demonstrators are seen lifting the man to his feet and asking if he is ok.
It happened close to where another Trump supporter was pelted with milkshake.
A video clip shows the beverage being flung at the mum as a furious woman screams "Nazi scum" at him.
Following the disgraceful attack, the milkshake victim told the Daily Mail he had been debating "moderate lefties" peacefully before the unpleasant scenes unfolded.
He said: "We have to put forward how aggressive the left can be - it's not us, you know if they want to call me right wing because I'm supporting Trump then I must be right wing, but I'm not a racist."
