Franklin D. Roosevelt was married for 40 years, but as the author writes in his new biography, it was the mistress whom he had abandoned at his wife’s request that the president spent the last days with THE HEALTH OF President Franklin D. Roosevelt was a cause for concern in early 1945. Some days he was solid and alert, the usual animated and witty conversationalist; a few hours later he could have a grey, ashen pallor, almost blue lips, severe shaking in his hands, glassy eyes and a slack jaw. Conscious of his frailty, probably sensing that the end was...