From pop art to the present: the dreams that shaped America

The British Museum’s new exhibition features the work of uncompromising US artist Glenn LigonFor Glenn Ligon, the provocative American artist, Barack Obama’s tenure in the White House was notable not just as the first time a black man took the reins of power in the US, but because the president knew about art. And the admiration went both ways: Obama hung Ligon’s work in his private quarters in the White House. This weekend the uncompromising art of the 56-year-old New Yorker f