It's like the Watergate scandal. Except that with Watergate, the dirty tricks campaign unravelled after the president had won re-election and in 1974, you did not have the internet. Donald Trump on Wednesday tweeted a profanity and accused a key opposition lawmaker of treason. In the week since the Democrats formally launched impeachment proceedings, the US president has responded with rage. But is it calculated rage? The kind that can get a populist leader re-elected?