First Thing: News outlets suspend coverage of Trump in escalating media access row

President’s decision to ban three news organisations from White House prompts backlash. Plus, a new resource to help trace the history of enslaved people in the 19th centuryGood morning. The row over media access to the presidency has deepened, with major US television news outlets agreeing to suspend their video coverage of Donald Trump after the administration banned journalists from several outlets from entering the White House grounds.The president had abruptly announced his ban against CNN, MS Now and Politico, saying he had had enough of “purposely negative stories” about him. On Monday the ban against CNN meant no broadcaster was covering Trump’s midday ribbon-cutting for a new White House helipad. The White House provided its own livestream but the president’s remarks were inaudibl