The judge presiding over the trial of former President Donald Trump for falsification of business records has threatened Trump with jail time if he continues to violate the judge’s gag order than some legal experts have said is unconstitutional. Judge Juan Merchan said Monday that since it was “clear” that the previous 10 $1,000 fines levied against the former president weren’t effective — current estimates of his net worth indicate that he could pay such a fine millions of times over and remain a billionaire — jail might be the only reasonable option. Merchan made the comments as he imposed…