Open this photo in gallery: Sen. JD Vance with former U.S. President Donald Trump in East Palestine, Ohio, on Feb. 22, 2023.MADDIE MCGARVEY/The New York Times News Service Donald Trump has narrowed his vice presidential shortlist to a handful of contenders as he prepares to announce his pick in the days before – or perhaps even at – next month’s Republican National Convention. He told reporters Saturday that he already has made his decision and that the person will be in attendance Thursday night in Atlanta at the first debate of the general election campaign against Democratic President Joe Biden....