Donald Trump said a full-scale invasion of Iran would be 'a waste of time' on Thursday and called for the country to get a new leader who would 'clean out everything.' Trump spoke to NBC News as the Islamic Republic sought a new supreme leader after the death of Ayatollah Khamenei and their foreign minister said a ground invasion would be a 'disaster' for the US. 'We want to go in and clean out everything. We don't want someone who would rebuild over a 10-year period,' Trump told NBC. 'We want them to have a good leader. We have some...