evidence: The New York Post on Wednesday published an article based on emails purportedly obtained from a laptop that Hunter Biden, the son of former vice president Joe Biden, had supposedly left behind for repair in a Delaware shop in April 2019. Here’s a brief explainer to help readers evaluate its significance. [...] MacIsaac told reporters on Wednesday that a MacBook laptop was dropped off at his shop in Wilmington, Del., in April 2019. MacIsaac, who said he was legally blind, said that he was almost certain that it was Hunter Biden who dropped off the computer. He said that he made several attempts to get in touch with Hunter Biden but the equipment was still in his hands 90 days after it had been left there, and he said that he became curious about what he’d seen. He made a copy of the hard drive and gave it to Giuliani. This past weekend, Giuliani passed a copy to the New York Post. But presumably the laptop would have been of use to the year-long Senate investigation, which found no wrongdoing by Biden.