Sixteen Nobel Prize–winning economists signed a letter in June expressing fear that Trump’s proposals would “reignite” inflation. With characteristic bravado, Donald Trump has vowed that if voters return him to the White House, “inflation will vanish completely.”It’s a message tailored for Americans who are still exasperated by the jump in consumer prices that began 3 1/2 years ago.Yet most mainstream economists say Trump’s policy proposals wouldn’t vanquish inflation.