11.1m illegals in US

A report released on Thursday estimates there are 11.1 million immigrants living in the US illegally - or 3.5 per cent of the overall US population.

Of them, more than 2.5 million immigrants live in the metropolitan areas of New York, Los Angeles and Chicago, which have pledged to fight President Donald Trump’s plans to expand deportations.

The study by the nonpartisan Pew Research Center underscores the challenges Trump could face in rounding up deportees.