The world this week
Politics The American Senate acquitted Donald Trump of the impeachment charges laid against him, bringing a swift end to the trial of the president after the Republican leadership decided that no witnesses should be called. Mitt Romney was the only Republican to vote for conviction, denouncing Mr Trump for “an appalling abuse of public trust”. The day before the verdict Mr Trump used his state-of-the-union speech to laud a “great American comeback” under his administration. Congress was in a poisonous mood. Mr Trump refused to shake the hand of Nancy Pelosi, the Democratic Speaker. She ripped up a copy of his speech after he finished speaking. The Iowa caucuses, the first stage in the race to nominate presidential candidates, were a mess. The state’s Democrats cast their votes for a champion to take…