CNN — It’s the recurring threat President Joe Biden’s reelection bid will never be able to fully outrun. The White House was forced into a fresh damage control effort Wednesday to defend the 81-year-old commander in chief’s acuity as he embarked on a grueling foreign trip and as the race gets nastier by the day. The latest episode was sparked by a Wall Street Journal article that cited descriptions – disputed by the White House – of the president’s state of mind and fitness from what it described as more than 45 interviews with both Democrats and Republicans. The president...