President-elect’s pledge to quash undocumented migration by deporting millions sets stage for Democratic resistance

Donald Trump’s vow to deport millions of undocumented migrants has no “price tag”, the president-elect has said, setting the scene for a confrontation between his incoming administration and Democratic officials across the US.

As Democratic state governors and mayors signalled their determination to resist the most extreme elements of his agenda, Trump promised that his campaign pledge to expel an estimated 11 million people – though Trump himself has given a figure as high as 21 million – would be implemented come what may.