By Jonathan Stempel and Luc Cohen NEW YORK (Reuters) -Fresh off a campaign victory in Iowa, Donald Trump sat in a New York courtroom on Tuesday to defend himself for a second time against charges that he defamed writer E. Jean Carroll after she accused him of raping her decades ago. Trump watched from the defendant’s table as a nine-person jury was chosen for a civil case that will put allegations of misconduct back in the headlines while he pursues the 2024 Republican presidential nomination. Opening arguments were expected later in the afternoon. Trump sat two tables behind Carroll, who is a…