On Tuesday, former president Donald Trump appeared in a federal courthouse in Miami where he pleaded not guilty to 37 criminal charges, including obstruction and unlawful retention of classified documents at his Florida home and private resort Mar-a-Lago. He is the first former U.S. president to face federal criminal charges. Trump and many of his supporters have called the indictment politically motivated. NPR's White House correspondent Franco Ordonez has been following Trump's case and he spoke to Ailsa Chang about how Trump, as well as his opponents in the Republican primary are reacting to the indictment on the campaign trail. Ailsa Chang spoke with NPR's Andrea Bernstein about why Trump sees so many lawyers come and go.