Today, while the subject is different, a Democratic White House is making exactly the same calculation. This maddens Democrats, who think Obama is forfeiting the initiative and looks weak besides, but think of the bright side — we’ve finally found a political principle that’s bipartisan. Under the Obama-Bush Doctrine, public inattention (and media vacations) in August are an immutable fact of life, a given that must be respected and honored. Look for that big presidential speech announcing the new war on unemployment just after Labor Day.