Less than a month after Will Smith’s “After Earth” crashed at the box office, Sony finds itself in another predicament with Roland Emmerich’s “White House Down.” The $150 million action thriller, starring Channing Tatum and Jamie Foxx, is the studio’s most expensive film of the summer but may debut as poorly as fourth place this weekend with a projected $27 million. Not only are the early estimates soft for a project Sony bought in a record spec deal for $3 million in 2012, it’s actually worse than this year’s other White House thriller, “Olympus Has Fallen,” which opened to $30.8...