In the wake of the assassination attempt on him, former president Donald Trump has said he scrapped plans to talk about how bad the current US administration is in favour of a speech at the Republican National Convention calling for unity. “I had all prepared an extremely tough speech, really good, all about the corrupt, horrible administration,” he told the tabloid New York Post in an interview published late Sunday. “But I threw it away.” Trump, 78, said he now wants to speak at the Republican Party convention in favour of overcoming the political divide in the country. “I want to try to uni…