all politicians have some con man in them. you're selling an electorate on things you, and they, know you won't be able to deliver.not saying they are 100% equal on the con man scale, but not worlds apart
Clinton was excellent at politics, probably the best American politician since FDR (LBJ was a master dealing but lacked the charisma, Reagan had the charisma/empathetic appeal but not as much of the dealing)
Trump is absolutely amazing at image/media/PR but he's terrible at politics, if politics is the art of the possible - dealing to get things done. look at how little (unsurprisingly) his administration has actually done.