Trump laying groundwork to impose national emergency by sowing election distrust

President's speech, declassification of documents and heightened claims of noncitizen voting have experts concerned

A series of moves by Donald Trump's administration to sow doubt in the integrity of US elections have intensified concern among voting experts - and sparked hope among election deniers - that it could declare a national emergency.

The White House and US federal agencies have released a string of documents this summer - including disputed analyses of alleged voting by noncitzens and historical intelligence memos - stoking expectations that the US president could move to exert greater control over November's US midterm elections.