One of Hunter Biden’s former business partners referred to Joe Biden as “the Big Guy” in a panicked message the same day The Post broke news of the infamous laptop from hell left behind by the president’s son, The Post has learned. James Gilliar, a former British Special Forces officer with ties to UK intelligence services, discussed The Post’s exclusive report with an unnamed person on Oct. 14, 2020, according to the message provided by a whistleblower to GOP congressional investigators probing the laptop. In the message, Gilliar, 58, reassured the person that the revelations about Biden’s apparent involvement in...