Donald Trump just dropped a “hint” on social media about the jury instructions in his criminal case in New York, and it shows prosecutors have a new advantage, a former prosecutor said Monday. Catherine Christian, a onetime assistant district attorney, appeared on MSNBC to discuss Trump’s hush money cover-up case, where he stands accused of paying off adult film star Stormy Daniels in order to impact the results of the 2016 presidential election. That case goes to closing arguments on Tuesday. The host asked Christian a series of questions about Trump’s ongoing trial, including one about a Tru…