Former federal prosecutor Andy McCarthy said Thursday that if jurors couldn’t agree on which crime former President Donald Trump allegedly falsified business records to cover up, then there was “doubt” in the case. Judge Juan Merchan issued instructions to the jury of seven men and five women Wednesday, pointing them to certain pieces of evidence in the case prior to the panel beginning its deliberations, but also telling them they did not have to be unanimous when it came to which unlawful act Trump was allegedly covering up. McCarthy and former Republican Rep. Trey Gowdy of South Carolina ra…