Spotlight: EU's Tusk says May's Chequers plan won't work

President of European Council Donald Tusk (C) attends a press conference after the European Union's (EU) Informal Summit in Salzburg, Austria, Sept. 20, 2018. European Council President Donald Tusk said Thursday that Britain's Brexit proposals "will not work" as it may risk undermining the EU single market. (Xinhua/Ye Pingfan)