At the beginning of Donald Trump’s trip to Davos, the US president’s plans for Greenland were vague, and a worry to European leaders. By the end of the day, military force was off the table and threats of tariffs dropped. This is just one example of what it has been like to follow Trump 2.0 in the last year. This week, Jonathan Freedland speaks to Ashley Parker of the Atlantic about why she thinks Americans are suffering from a new politically induced condition and why the midterms in November might be the perfect remedy