India, April 21 -- In a little over two weeks, three former US presidents have stepped into the public spotlight to raise concerns about President Donald Trump - an unusual move given the long-standing tradition of ex-presidents avoiding criticism of their successors.

While Barack Obama, Joe Biden, and Bill Clinton didn't mention Trump by name, their messages were clear, according to a report by The Washington Post.

Through both their words and appearances, the Democratic leaders signalled that American democracy is facing an abnormal moment, where longstanding norms are being cast aside and exceptional responses are necessary. The report added that among living presidents, only Republican George W Bush has stayed silent since Trump's i...