Rock star Jack White has unleashed a blistering takedown of Donald Trump, labeling the president a “low life fascist” who is “masquerading as a Christian,” amid his explosive feud with the White House. White’s 850-word anti-Trump manifesto comes after White House Communications Director Steven Cheung went ballistic Tuesday over the rocker’s dig at the president’s gilded Oval Office makeover. In a statement, Cheung called the Grammy-winning musician a “washed up, has-been loser” who is “masquerading as a real artist” because he “fails to appreciate” the “splendor” of the Oval Office. Jack White, the former frontman of The White Stripes, repeatedly...