It seems politicians no longer feel bound by the basic rules of dignity, decorum or institutional respect. Across many parts of the democratic world, the standard of what the public is expected to tolerate from its leaders is plummeting.Donald Trump has done more than most politicians to shift the Overton window on what constitutes normal political discourse and conduct in the 21st century.Subscribe to gift this articleGift 5 articles to anyone you choose each month when you subscribe.Subscribe nowAlready a subscriber? Fetching latest articles