Protesters cause a chaotic traffic situation with the shutdown of a freeway in downtown Los Angeles, California, after the announcement of the US presidential election results. Pics/AFP

Washington: Islamic State and al-Qaeda jihadists have ‘hailed’ Donald Trump’s win in the presidential polls as the beginning of “dark times” for the US with some extremists predicting America’s “demise” at the hands of the billionaire businessman, according to media reports.