A new Washington Post poll finds public trust of Bush slipping on what was supposed to be his strongest issue: Exactly half the country now approves of the way Bush is managing the U.S. war on terrorism, down 13 points since April, according to the poll. Barely two months ago, Bush comfortably led Kerry, the presumptive Democratic nominee, by 21 percentage points when voters were asked which man they trusted to deal with the terrorist threat. Today the country is evenly divided, with 48 percent preferring Kerry and 47 percent favoring Bush.