Former President Donald Trump arrived Tuesday at a Manhattan courthouse ahead of his arraignment on criminal charges stemming from a hush money payment to a porn actor during his 2016 campaign. Trump pumped his fist as he exited Trump Tower minutes earlier, then traveled in an eight-car motorcade down a highway along the East River to the downtown courthouse, where's he expected to surrender to authorities. He’s expected to be fingerprinted and processed, and his mug shot may be taken — a remarkable reckoning after years of investigations and an extraordinary moment in U.S. history. The booking and appearance before Judge Juan Merchan should be relatively brief — though hardly routine — as Trump learns for the first time the charges against him. Trump will plead not guilty, according to his lawyers, and is expected to enter the plea himself, as is standard in the court. MORE: https://www.cbs8.com/article/news/nation-world/donald-trump-criminal-charges/507-6b4e74e6-0bb0-47bf-9690-1859e2f97f4a