On February 22nd, in an office in White Plains, two lawyers handed over a hard drive to a Manhattan Assistant District Attorney, who, along with two investigators, had driven up from New York City in a heavy snowstorm. Although the exchange didn't look momentous, it set in motion the next phase of one of the most significant legal showdowns in American history. Hours earlier, the Supreme Court had ordered former President Donald Trump to comply with a subpoena for nearly a decade's worth of private financial records, including his tax returns.