Pakistan, Oct. 5 -- In a move critics are calling authoritarian, US President Donald Trump has deployed 300 National Guard troops to Chicago following a federal agent's shooting of an allegedly armed motorist - an act that has further inflamed tensions between the White House and Democratic-led cities.While Trump justifies the deployment as a "law and order" measure, opponents accuse him of militarizing American streets to stoke fear and consolidate control ahead of a volatile political season.A federal judge in Portland, meanwhile, blocked Trump's attempt to send troops there, condemning his justification as "untethered to the facts." Civil rights advocates say this is not crime control but an assault on constitutional limits.Trump's "Op...