Promoted by President Donald Trump as “a must watch,” the Melania Trump documentary “Melania” debuted with a better-than-expected $7 million in ticket sales, according to studio estimates Sunday. The release of “Melania” was unlike any seen before. Amazon MGM Studios paid $40 million for the rights, plus some $35 million to market it, making it the most expensive documentary ever. While the result would be a flop for most films with such high costs, “Melania” was a success by documentary standards. It’s the best opening weekend for a documentary, outside of concert films, in 14 years. The Sam Raimi-directed survival thriller “Send Help” was No. 1 with $20 million.