'The Purge: Election Year' All three films began rolling out Thursday night in advance of the long Fourth of July holiday. Horror offering The Purge: Election Year set off early fireworks at the box office Thursday night, earning $3.6 million and easily scaring off The Legend of Tarzan and Steven Spielberg's The BFG. Legend of Tarzan, from Warner Bros, grossed $2.7 million Thursday night, while Disney's family entry The BFG earned $775,000 in previews.