A decade ago Nick Adams' attention was occupied by quotidian debates about speed limits on inner-west streets, portraits of Queen Elizabeth and Ashfield's pigeon population.

Now, the former Sydney councillor and Young Liberal operator finds himself at the centre of US President Donald Trump's campaign to overhaul America's immigration system.

Mr Adams, a former Ashfield councillor cum motivational speaker on American values, won warm praise from Mr Trump on Saturday for his recent book, Green Card Warrior.

Mr Trump praised the book as "a must read", following a speech to a joint session of Congress in which he advocated America switch to an immigration system more like Australia's.