By Pete Schroeder WASHINGTON (Reuters) -Senior Democrats in the U.S. Senate are pressing JPMorgan Chase & Co for details on how they take overdue credit card borrowers to court. In a letter sent to the bank on Monday, Senate Banking Committee Chairman Sherrod Brown pressed for specifics on how the bank tries to collect on overdue credit card debt, and in particular if the bank uses “robo-signing” to quickly process legal documents without proper review. “We request that Chase provide detailed information regarding the bank’s credit card debt collection practices. Chase should not utilize robo-…