Washington (AFP) – President Donald Trump checked out of hospital Monday after four days of emergency treatment for Covid-19, pulling off his mask the moment he reached the White House and vowing to quickly get back on the campaign trail.Shortly beforehand, Trump had tweeted that Americans, who have lost nearly 210,000 people to the virus, have nothing to fear.A series of made-for-TV moments allowed Trump to squeeze the maximum from his medical discharge, starting by exiting alone from the large gold-colored front doors of the Walter Reed military hospital just outside Washington.Live on telev…