Mr. Biden emphasized that he did not believe his family did anything wrong, but he feared political attacks by Donald J. Trump.President Biden pardoned five members of his family in his last minutes in office, saying in a statement that he did so not because they did anything wrong but because he feared political attacks from incoming President Donald J. Trump. “My family has been subjected to unrelenting attacks and threats, motivated solely by a desire to hurt me — the worst kind of partisan politics,” he said in his last statement as president. “Unfortunately, I have no reason to...